Merge pull request #12 from chrislusf/master

sync

93 files changed, 2256 insertions, 1469 deletions

diff --git a/weed/Makefile b/weed/Makefile
new file mode 100644
index 000000000..ec95aeacb
--- /dev/null
+++ b/weed/Makefile
@@ -0,0 +1,19 @@
+BINARY = weed
+
+SOURCE_DIR = .
+
+all: debug_mount
+
+.PHONY : clean debug_mount
+
+clean:
+	go clean $(SOURCE_DIR)
+	rm -f $(BINARY)
+
+debug_mount:
+	go build -gcflags="all=-N -l"
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- mount -dir=~/tmp/mm
+
+debug_server:
+	go build -gcflags="all=-N -l"
+	dlv --listen=:2345 --headless=true --api-version=2 --accept-multiclient exec weed -- server -dir=/Volumes/mobile_disk/99 -filer -volume.port=8343 -s3 -volume.max=0
diff --git a/weed/command/export.go b/weed/command/export.go
index 411d231cb..3ea4b00d3 100644
--- a/weed/command/export.go
+++ b/weed/command/export.go
@@ -72,9 +72,9 @@ var (
 
 func printNeedle(vid needle.VolumeId, n *needle.Needle, version needle.Version, deleted bool) {
 	key := needle.NewFileIdFromNeedle(vid, n).String()
-	size := n.DataSize
+	size := int32(n.DataSize)
 	if version == needle.Version1 {
-		size = n.Size
+		size = int32(n.Size)
 	}
 	fmt.Printf("%s\t%s\t%d\t%t\t%s\t%s\t%s\t%t\n",
 		key,
@@ -111,7 +111,7 @@ func (scanner *VolumeFileScanner4Export) VisitNeedle(n *needle.Needle, offset in
 	nv, ok := needleMap.Get(n.Id)
 	glog.V(3).Infof("key %d offset %d size %d disk_size %d compressed %v ok %v nv %+v",
 		n.Id, offset, n.Size, n.DiskSize(scanner.version), n.IsCompressed(), ok, nv)
-	if ok && nv.Size > 0 && nv.Size != types.TombstoneFileSize && nv.Offset.ToAcutalOffset() == offset {
+	if ok && nv.Size.IsValid() && nv.Offset.ToAcutalOffset() == offset {
 		if newerThanUnix >= 0 && n.HasLastModifiedDate() && n.LastModified < uint64(newerThanUnix) {
 			glog.V(3).Infof("Skipping this file, as it's old enough: LastModified %d vs %d",
 				n.LastModified, newerThanUnix)
diff --git a/weed/command/fix.go b/weed/command/fix.go
index e1455790f..ae9a051b8 100644
--- a/weed/command/fix.go
+++ b/weed/command/fix.go
@@ -48,7 +48,7 @@ func (scanner *VolumeFileScanner4Fix) ReadNeedleBody() bool {
 
 func (scanner *VolumeFileScanner4Fix) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
 	glog.V(2).Infof("key %d offset %d size %d disk_size %d compressed %v", n.Id, offset, n.Size, n.DiskSize(scanner.version), n.IsCompressed())
-	if n.Size > 0 && n.Size != types.TombstoneFileSize {
+	if n.Size.IsValid() {
 		pe := scanner.nm.Set(n.Id, types.ToOffset(offset), n.Size)
 		glog.V(2).Infof("saved %d with error %v", n.Size, pe)
 	} else {
diff --git a/weed/command/server.go b/weed/command/server.go
index 565563c77..d16095075 100644
--- a/weed/command/server.go
+++ b/weed/command/server.go
@@ -96,7 +96,7 @@ func init() {
 	serverOptions.v.fixJpgOrientation = cmdServer.Flag.Bool("volume.images.fix.orientation", false, "Adjust jpg orientation when uploading.")
 	serverOptions.v.readRedirect = cmdServer.Flag.Bool("volume.read.redirect", true, "Redirect moved or non-local volumes.")
 	serverOptions.v.compactionMBPerSecond = cmdServer.Flag.Int("volume.compactionMBps", 0, "limit compaction speed in mega bytes per second")
-	serverOptions.v.fileSizeLimitMB = cmdServer.Flag.Int("volume.fileSizeLimitMB", 256, "limit file size to avoid out of memory")
+	serverOptions.v.fileSizeLimitMB = cmdServer.Flag.Int("volume.fileSizeLimitMB", 1024, "limit file size to avoid out of memory")
 	serverOptions.v.publicUrl = cmdServer.Flag.String("volume.publicUrl", "", "publicly accessible address")
 	serverOptions.v.pprof = &False
 
diff --git a/weed/command/volume.go b/weed/command/volume.go
index 4f04a467d..6fb7447e7 100644
--- a/weed/command/volume.go
+++ b/weed/command/volume.go
@@ -76,7 +76,7 @@ func init() {
 	v.cpuProfile = cmdVolume.Flag.String("cpuprofile", "", "cpu profile output file")
 	v.memProfile = cmdVolume.Flag.String("memprofile", "", "memory profile output file")
 	v.compactionMBPerSecond = cmdVolume.Flag.Int("compactionMBps", 0, "limit background compaction or copying speed in mega bytes per second")
-	v.fileSizeLimitMB = cmdVolume.Flag.Int("fileSizeLimitMB", 256, "limit file size to avoid out of memory")
+	v.fileSizeLimitMB = cmdVolume.Flag.Int("fileSizeLimitMB", 1024, "limit file size to avoid out of memory")
 	v.pprof = cmdVolume.Flag.Bool("pprof", false, "enable pprof http handlers. precludes --memprofile and --cpuprofile")
 }
 
diff --git a/weed/filer2/entry.go b/weed/filer2/entry.go
index 00b9b132d..fedfde40d 100644
--- a/weed/filer2/entry.go
+++ b/weed/filer2/entry.go
@@ -22,6 +22,7 @@ type Attr struct {
 	GroupNames    []string
 	SymlinkTarget string
 	Md5           []byte
+	FileSize      uint64
 }
 
 func (attr Attr) IsDirectory() bool {
@@ -39,7 +40,7 @@ type Entry struct {
 }
 
 func (entry *Entry) Size() uint64 {
-	return TotalSize(entry.Chunks)
+	return maxUint64(TotalSize(entry.Chunks), entry.FileSize)
 }
 
 func (entry *Entry) Timestamp() time.Time {
@@ -81,3 +82,10 @@ func FromPbEntry(dir string, entry *filer_pb.Entry) *Entry {
 		Chunks:   entry.Chunks,
 	}
 }
+
+func maxUint64(x, y uint64) uint64 {
+	if x > y {
+		return x
+	}
+	return y
+}
diff --git a/weed/filer2/entry_codec.go b/weed/filer2/entry_codec.go
index 47c911011..4d615194f 100644
--- a/weed/filer2/entry_codec.go
+++ b/weed/filer2/entry_codec.go
@@ -53,6 +53,7 @@ func EntryAttributeToPb(entry *Entry) *filer_pb.FuseAttributes {
 		GroupName:     entry.Attr.GroupNames,
 		SymlinkTarget: entry.Attr.SymlinkTarget,
 		Md5:           entry.Attr.Md5,
+		FileSize:      entry.Attr.FileSize,
 	}
 }
 
@@ -73,6 +74,7 @@ func PbToEntryAttribute(attr *filer_pb.FuseAttributes) Attr {
 	t.GroupNames = attr.GroupName
 	t.SymlinkTarget = attr.SymlinkTarget
 	t.Md5 = attr.Md5
+	t.FileSize = attr.FileSize
 
 	return t
 }
diff --git a/weed/filer2/filechunk_manifest.go b/weed/filer2/filechunk_manifest.go
index 62d2c6e7f..037b0c1e8 100644
--- a/weed/filer2/filechunk_manifest.go
+++ b/weed/filer2/filechunk_manifest.go
@@ -64,7 +64,7 @@ func fetchChunk(lookupFileIdFn LookupFileIdFunctionType, fileId string, cipherKe
 		return nil, err
 	}
 	var buffer bytes.Buffer
-	err = util.ReadUrlAsStream(urlString, cipherKey, isGzipped, true, 0, 0, func(data []byte) {
+	err = util.ReadUrlAsStream(urlString+"?readDeleted=true", cipherKey, isGzipped, true, 0, 0, func(data []byte) {
 		buffer.Write(data)
 	})
 	if err != nil {
diff --git a/weed/filer2/filechunks.go b/weed/filer2/filechunks.go
index ea7772b4a..1ab6679f9 100644
--- a/weed/filer2/filechunks.go
+++ b/weed/filer2/filechunks.go
@@ -20,6 +20,10 @@ func TotalSize(chunks []*filer_pb.FileChunk) (size uint64) {
 	return
 }
 
+func FileSize(entry *filer_pb.Entry) (size uint64) {
+	return maxUint64(TotalSize(entry.Chunks), entry.Attributes.FileSize)
+}
+
 func ETag(entry *filer_pb.Entry) (etag string) {
 	if entry.Attributes == nil || entry.Attributes.Md5 == nil {
 		return ETagChunks(entry.Chunks)
@@ -100,7 +104,7 @@ type ChunkView struct {
 	FileId      string
 	Offset      int64
 	Size        uint64
-	LogicOffset int64
+	LogicOffset int64 // actual offset in the file, for the data specified via [offset, offset+size) in current chunk
 	ChunkSize   uint64
 	CipherKey   []byte
 	IsGzipped   bool
@@ -130,17 +134,18 @@ func ViewFromVisibleIntervals(visibles []VisibleInterval, offset int64, size int
 
 	for _, chunk := range visibles {
 
-		if chunk.start <= offset && offset < chunk.stop && offset < stop {
+		chunkStart, chunkStop := max(offset, chunk.start), min(stop, chunk.stop)
+
+		if chunkStart < chunkStop {
 			views = append(views, &ChunkView{
 				FileId:      chunk.fileId,
-				Offset:      offset - chunk.start, // offset is the data starting location in this file id
-				Size:        uint64(min(chunk.stop, stop) - offset),
-				LogicOffset: offset,
+				Offset:      chunkStart - chunk.start + chunk.chunkOffset,
+				Size:        uint64(chunkStop - chunkStart),
+				LogicOffset: chunkStart,
 				ChunkSize:   chunk.chunkSize,
 				CipherKey:   chunk.cipherKey,
 				IsGzipped:   chunk.isGzipped,
 			})
-			offset = min(chunk.stop, stop)
 		}
 	}
 
@@ -149,10 +154,11 @@ func ViewFromVisibleIntervals(visibles []VisibleInterval, offset int64, size int
 }
 
 func logPrintf(name string, visibles []VisibleInterval) {
+
 	/*
-		log.Printf("%s len %d", name, len(visibles))
+		glog.V(0).Infof("%s len %d", name, len(visibles))
 		for _, v := range visibles {
-			log.Printf("%s:  => %+v", name, v)
+			glog.V(0).Infof("%s:  [%d,%d)", name, v.start, v.stop)
 		}
 	*/
 }
@@ -165,7 +171,7 @@ var bufPool = sync.Pool{
 
 func MergeIntoVisibles(visibles, newVisibles []VisibleInterval, chunk *filer_pb.FileChunk) []VisibleInterval {
 
-	newV := newVisibleInterval(chunk.Offset, chunk.Offset+int64(chunk.Size), chunk.GetFileIdString(), chunk.Mtime, chunk.Size, chunk.CipherKey, chunk.IsCompressed)
+	newV := newVisibleInterval(chunk.Offset, chunk.Offset+int64(chunk.Size), chunk.GetFileIdString(), chunk.Mtime, 0, chunk.Size, chunk.CipherKey, chunk.IsCompressed)
 
 	length := len(visibles)
 	if length == 0 {
@@ -177,13 +183,13 @@ func MergeIntoVisibles(visibles, newVisibles []VisibleInterval, chunk *filer_pb.
 	}
 
 	logPrintf("  before", visibles)
+	chunkStop := chunk.Offset + int64(chunk.Size)
 	for _, v := range visibles {
 		if v.start < chunk.Offset && chunk.Offset < v.stop {
-			newVisibles = append(newVisibles, newVisibleInterval(v.start, chunk.Offset, v.fileId, v.modifiedTime, chunk.Size, v.cipherKey, v.isGzipped))
+			newVisibles = append(newVisibles, newVisibleInterval(v.start, chunk.Offset, v.fileId, v.modifiedTime, v.chunkOffset, v.chunkSize, v.cipherKey, v.isGzipped))
 		}
-		chunkStop := chunk.Offset + int64(chunk.Size)
 		if v.start < chunkStop && chunkStop < v.stop {
-			newVisibles = append(newVisibles, newVisibleInterval(chunkStop, v.stop, v.fileId, v.modifiedTime, chunk.Size, v.cipherKey, v.isGzipped))
+			newVisibles = append(newVisibles, newVisibleInterval(chunkStop, v.stop, v.fileId, v.modifiedTime, v.chunkOffset+(chunkStop-v.start), v.chunkSize, v.cipherKey, v.isGzipped))
 		}
 		if chunkStop <= v.start || v.stop <= chunk.Offset {
 			newVisibles = append(newVisibles, v)
@@ -219,6 +225,7 @@ func NonOverlappingVisibleIntervals(lookupFileIdFn LookupFileIdFunctionType, chu
 	var newVisibles []VisibleInterval
 	for _, chunk := range chunks {
 
+		// glog.V(0).Infof("merge [%d,%d)", chunk.Offset, chunk.Offset+int64(chunk.Size))
 		newVisibles = MergeIntoVisibles(visibles, newVisibles, chunk)
 		t := visibles[:0]
 		visibles = newVisibles
@@ -239,17 +246,19 @@ type VisibleInterval struct {
 	stop         int64
 	modifiedTime int64
 	fileId       string
+	chunkOffset  int64
 	chunkSize    uint64
 	cipherKey    []byte
 	isGzipped    bool
 }
 
-func newVisibleInterval(start, stop int64, fileId string, modifiedTime int64, chunkSize uint64, cipherKey []byte, isGzipped bool) VisibleInterval {
+func newVisibleInterval(start, stop int64, fileId string, modifiedTime int64, chunkOffset int64, chunkSize uint64, cipherKey []byte, isGzipped bool) VisibleInterval {
 	return VisibleInterval{
 		start:        start,
 		stop:         stop,
 		fileId:       fileId,
 		modifiedTime: modifiedTime,
+		chunkOffset:  chunkOffset, // the starting position in the chunk
 		chunkSize:    chunkSize,
 		cipherKey:    cipherKey,
 		isGzipped:    isGzipped,
@@ -262,3 +271,9 @@ func min(x, y int64) int64 {
 	}
 	return y
 }
+func max(x, y int64) int64 {
+	if x <= y {
+		return y
+	}
+	return x
+}
diff --git a/weed/filer2/filechunks_test.go b/weed/filer2/filechunks_test.go
index bfee59198..70da6e16c 100644
--- a/weed/filer2/filechunks_test.go
+++ b/weed/filer2/filechunks_test.go
@@ -1,10 +1,13 @@
 package filer2
 
 import (
+	"fmt"
 	"log"
+	"math"
 	"testing"
 
-	"fmt"
+	"github.com/stretchr/testify/assert"
+
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 )
 
@@ -91,12 +94,12 @@ func TestIntervalMerging(t *testing.T) {
 		// case 2: updates overwrite part of previous chunks
 		{
 			Chunks: []*filer_pb.FileChunk{
-				{Offset: 0, Size: 100, FileId: "abc", Mtime: 123},
-				{Offset: 0, Size: 50, FileId: "asdf", Mtime: 134},
+				{Offset: 0, Size: 100, FileId: "a", Mtime: 123},
+				{Offset: 0, Size: 70, FileId: "b", Mtime: 134},
 			},
 			Expected: []*VisibleInterval{
-				{start: 0, stop: 50, fileId: "asdf"},
-				{start: 50, stop: 100, fileId: "abc"},
+				{start: 0, stop: 70, fileId: "b"},
+				{start: 70, stop: 100, fileId: "a", chunkOffset: 70},
 			},
 		},
 		// case 3: updates overwrite full chunks
@@ -126,14 +129,14 @@ func TestIntervalMerging(t *testing.T) {
 		// case 5: updates overwrite full chunks
 		{
 			Chunks: []*filer_pb.FileChunk{
-				{Offset: 0, Size: 100, FileId: "abc", Mtime: 123},
-				{Offset: 0, Size: 200, FileId: "asdf", Mtime: 184},
-				{Offset: 70, Size: 150, FileId: "abc", Mtime: 143},
-				{Offset: 80, Size: 100, FileId: "xxxx", Mtime: 134},
+				{Offset: 0, Size: 100, FileId: "a", Mtime: 123},
+				{Offset: 0, Size: 200, FileId: "d", Mtime: 184},
+				{Offset: 70, Size: 150, FileId: "c", Mtime: 143},
+				{Offset: 80, Size: 100, FileId: "b", Mtime: 134},
 			},
 			Expected: []*VisibleInterval{
-				{start: 0, stop: 200, fileId: "asdf"},
-				{start: 200, stop: 220, fileId: "abc"},
+				{start: 0, stop: 200, fileId: "d"},
+				{start: 200, stop: 220, fileId: "c", chunkOffset: 130},
 			},
 		},
 		// case 6: same updates
@@ -204,6 +207,10 @@ func TestIntervalMerging(t *testing.T) {
 				t.Fatalf("failed on test case %d, interval %d, chunkId %s, expect %s",
 					i, x, interval.fileId, testcase.Expected[x].fileId)
 			}
+			if interval.chunkOffset != testcase.Expected[x].chunkOffset {
+				t.Fatalf("failed on test case %d, interval %d, chunkOffset %d, expect %d",
+					i, x, interval.chunkOffset, testcase.Expected[x].chunkOffset)
+			}
 		}
 		if len(intervals) != len(testcase.Expected) {
 			t.Fatalf("failed to compact test case %d, len %d expected %d", i, len(intervals), len(testcase.Expected))
@@ -251,14 +258,14 @@ func TestChunksReading(t *testing.T) {
 		// case 2: updates overwrite part of previous chunks
 		{
 			Chunks: []*filer_pb.FileChunk{
-				{Offset: 0, Size: 100, FileId: "abc", Mtime: 123},
-				{Offset: 0, Size: 50, FileId: "asdf", Mtime: 134},
+				{Offset: 3, Size: 100, FileId: "a", Mtime: 123},
+				{Offset: 10, Size: 50, FileId: "b", Mtime: 134},
 			},
-			Offset: 25,
-			Size:   50,
+			Offset: 30,
+			Size:   40,
 			Expected: []*ChunkView{
-				{Offset: 25, Size: 25, FileId: "asdf", LogicOffset: 25},
-				{Offset: 0, Size: 25, FileId: "abc", LogicOffset: 50},
+				{Offset: 20, Size: 30, FileId: "b", LogicOffset: 30},
+				{Offset: 57, Size: 10, FileId: "a", LogicOffset: 60},
 			},
 		},
 		// case 3: updates overwrite full chunks
@@ -286,22 +293,22 @@ func TestChunksReading(t *testing.T) {
 			Size:   400,
 			Expected: []*ChunkView{
 				{Offset: 0, Size: 200, FileId: "asdf", LogicOffset: 0},
-				// {Offset: 0, Size: 150, FileId: "xxxx"}, // missing intervals should not happen
+				{Offset: 0, Size: 150, FileId: "xxxx", LogicOffset: 250},
 			},
 		},
 		// case 5: updates overwrite full chunks
 		{
 			Chunks: []*filer_pb.FileChunk{
-				{Offset: 0, Size: 100, FileId: "abc", Mtime: 123},
-				{Offset: 0, Size: 200, FileId: "asdf", Mtime: 184},
-				{Offset: 70, Size: 150, FileId: "abc", Mtime: 143},
+				{Offset: 0, Size: 100, FileId: "a", Mtime: 123},
+				{Offset: 0, Size: 200, FileId: "c", Mtime: 184},
+				{Offset: 70, Size: 150, FileId: "b", Mtime: 143},
 				{Offset: 80, Size: 100, FileId: "xxxx", Mtime: 134},
 			},
 			Offset: 0,
 			Size:   220,
 			Expected: []*ChunkView{
-				{Offset: 0, Size: 200, FileId: "asdf", LogicOffset: 0},
-				{Offset: 0, Size: 20, FileId: "abc", LogicOffset: 200},
+				{Offset: 0, Size: 200, FileId: "c", LogicOffset: 0},
+				{Offset: 130, Size: 20, FileId: "b", LogicOffset: 200},
 			},
 		},
 		// case 6: same updates
@@ -370,18 +377,21 @@ func TestChunksReading(t *testing.T) {
 	}
 
 	for i, testcase := range testcases {
+		if i != 2 {
+			// continue
+		}
 		log.Printf("++++++++++ read test case %d ++++++++++++++++++++", i)
 		chunks := ViewFromChunks(nil, testcase.Chunks, testcase.Offset, testcase.Size)
 		for x, chunk := range chunks {
 			log.Printf("read case %d, chunk %d, offset=%d, size=%d, fileId=%s",
 				i, x, chunk.Offset, chunk.Size, chunk.FileId)
 			if chunk.Offset != testcase.Expected[x].Offset {
-				t.Fatalf("failed on read case %d, chunk %d, Offset %d, expect %d",
-					i, x, chunk.Offset, testcase.Expected[x].Offset)
+				t.Fatalf("failed on read case %d, chunk %s, Offset %d, expect %d",
+					i, chunk.FileId, chunk.Offset, testcase.Expected[x].Offset)
 			}
 			if chunk.Size != testcase.Expected[x].Size {
-				t.Fatalf("failed on read case %d, chunk %d, Size %d, expect %d",
-					i, x, chunk.Size, testcase.Expected[x].Size)
+				t.Fatalf("failed on read case %d, chunk %s, Size %d, expect %d",
+					i, chunk.FileId, chunk.Size, testcase.Expected[x].Size)
 			}
 			if chunk.FileId != testcase.Expected[x].FileId {
 				t.Fatalf("failed on read case %d, chunk %d, FileId %s, expect %s",
@@ -418,3 +428,74 @@ func BenchmarkCompactFileChunks(b *testing.B) {
 		CompactFileChunks(nil, chunks)
 	}
 }
+
+func TestViewFromVisibleIntervals(t *testing.T) {
+	visibles := []VisibleInterval{
+		{
+			start:  0,
+			stop:   25,
+			fileId: "fid1",
+		},
+		{
+			start:  4096,
+			stop:   8192,
+			fileId: "fid2",
+		},
+		{
+			start:  16384,
+			stop:   18551,
+			fileId: "fid3",
+		},
+	}
+
+	views := ViewFromVisibleIntervals(visibles, 0, math.MaxInt32)
+
+	if len(views) != len(visibles) {
+		assert.Equal(t, len(visibles), len(views), "ViewFromVisibleIntervals error")
+	}
+
+}
+
+func TestViewFromVisibleIntervals2(t *testing.T) {
+	visibles := []VisibleInterval{
+		{
+			start:  344064,
+			stop:   348160,
+			fileId: "fid1",
+		},
+		{
+			start:  348160,
+			stop:   356352,
+			fileId: "fid2",
+		},
+	}
+
+	views := ViewFromVisibleIntervals(visibles, 0, math.MaxInt32)
+
+	if len(views) != len(visibles) {
+		assert.Equal(t, len(visibles), len(views), "ViewFromVisibleIntervals error")
+	}
+
+}
+
+func TestViewFromVisibleIntervals3(t *testing.T) {
+	visibles := []VisibleInterval{
+		{
+			start:  1000,
+			stop:   2000,
+			fileId: "fid1",
+		},
+		{
+			start:  3000,
+			stop:   4000,
+			fileId: "fid2",
+		},
+	}
+
+	views := ViewFromVisibleIntervals(visibles, 1700, 1500)
+
+	if len(views) != len(visibles) {
+		assert.Equal(t, len(visibles), len(views), "ViewFromVisibleIntervals error")
+	}
+
+}
diff --git a/weed/filer2/filer.go b/weed/filer2/filer.go
index dd4c38857..d3dfa5a6f 100644
--- a/weed/filer2/filer.go
+++ b/weed/filer2/filer.go
@@ -9,8 +9,6 @@ import (
 
 	"google.golang.org/grpc"
 
-	"github.com/karlseguin/ccache"
-
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
@@ -27,7 +25,6 @@ var (
 
 type Filer struct {
 	Store               *FilerStoreWrapper
-	directoryCache      *ccache.Cache
 	MasterClient        *wdclient.MasterClient
 	fileIdDeletionQueue *util.UnboundedQueue
 	GrpcDialOption      grpc.DialOption
@@ -44,7 +41,6 @@ type Filer struct {
 func NewFiler(masters []string, grpcDialOption grpc.DialOption,
 	filerHost string, filerGrpcPort uint32, collection string, replication string, notifyFn func()) *Filer {
 	f := &Filer{
-		directoryCache:      ccache.New(ccache.Configure().MaxSize(1000).ItemsToPrune(100)),
 		MasterClient:        wdclient.NewMasterClient(grpcDialOption, "filer", filerHost, filerGrpcPort, masters),
 		fileIdDeletionQueue: util.NewUnboundedQueue(),
 		GrpcDialOption:      grpcDialOption,
@@ -77,10 +73,6 @@ func (f *Filer) GetStore() (store FilerStore) {
 	return f.Store
 }
 
-func (f *Filer) DisableDirectoryCache() {
-	f.directoryCache = nil
-}
-
 func (fs *Filer) GetMaster() string {
 	return fs.MasterClient.GetMaster()
 }
@@ -117,16 +109,9 @@ func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool, isFr
 		dirPath := "/" + util.Join(dirParts[:i]...)
 		// fmt.Printf("%d directory: %+v\n", i, dirPath)
 
-		// first check local cache
-		dirEntry := f.cacheGetDirectory(dirPath)
-
-		// not found, check the store directly
-		if dirEntry == nil {
-			glog.V(4).Infof("find uncached directory: %s", dirPath)
-			dirEntry, _ = f.FindEntry(ctx, util.FullPath(dirPath))
-		} else {
-			// glog.V(4).Infof("found cached directory: %s", dirPath)
-		}
+		// check the store directly
+		glog.V(4).Infof("find uncached directory: %s", dirPath)
+		dirEntry, _ := f.FindEntry(ctx, util.FullPath(dirPath))
 
 		// no such existing directory
 		if dirEntry == nil {
@@ -166,9 +151,6 @@ func (f *Filer) CreateEntry(ctx context.Context, entry *Entry, o_excl bool, isFr
 			return fmt.Errorf("%s is a file", dirPath)
 		}
 
-		// cache the directory entry
-		f.cacheSetDirectory(dirPath, dirEntry, i)
-
 		// remember the direct parent directory entry
 		if i == len(dirParts)-1 {
 			lastDirectoryEntry = dirEntry
@@ -295,45 +277,6 @@ func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, sta
 	return
 }
 
-func (f *Filer) cacheDelDirectory(dirpath string) {
-
-	if dirpath == "/" {
-		return
-	}
-
-	if f.directoryCache == nil {
-		return
-	}
-	f.directoryCache.Delete(dirpath)
-	return
-}
-
-func (f *Filer) cacheGetDirectory(dirpath string) *Entry {
-
-	if f.directoryCache == nil {
-		return nil
-	}
-	item := f.directoryCache.Get(dirpath)
-	if item == nil {
-		return nil
-	}
-	return item.Value().(*Entry)
-}
-
-func (f *Filer) cacheSetDirectory(dirpath string, dirEntry *Entry, level int) {
-
-	if f.directoryCache == nil {
-		return
-	}
-
-	minutes := 60
-	if level < 10 {
-		minutes -= level * 6
-	}
-
-	f.directoryCache.Set(dirpath, dirEntry, time.Duration(minutes)*time.Minute)
-}
-
 func (f *Filer) Shutdown() {
 	f.LocalMetaLogBuffer.Shutdown()
 	f.Store.Shutdown()
diff --git a/weed/filer2/filer_delete_entry.go b/weed/filer2/filer_delete_entry.go
index 35099a472..926569b30 100644
--- a/weed/filer2/filer_delete_entry.go
+++ b/weed/filer2/filer_delete_entry.go
@@ -65,6 +65,7 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 		}
 		if lastFileName == "" && !isRecursive && len(entries) > 0 {
 			// only for first iteration in the loop
+			glog.Errorf("deleting a folder %s has children: %+v ...", entry.FullPath, entries[0].Name())
 			return nil, fmt.Errorf("fail to delete non-empty folder: %s", entry.FullPath)
 		}
 
@@ -73,7 +74,6 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 			var dirChunks []*filer_pb.FileChunk
 			if sub.IsDirectory() {
 				dirChunks, err = f.doBatchDeleteFolderMetaAndData(ctx, sub, isRecursive, ignoreRecursiveError, shouldDeleteChunks, false)
-				f.cacheDelDirectory(string(sub.FullPath))
 				chunks = append(chunks, dirChunks...)
 			} else {
 				f.NotifyUpdateEvent(ctx, sub, nil, shouldDeleteChunks, isFromOtherCluster)
@@ -107,9 +107,7 @@ func (f *Filer) doDeleteEntryMetaAndData(ctx context.Context, entry *Entry, shou
 	if storeDeletionErr := f.Store.DeleteEntry(ctx, entry.FullPath); storeDeletionErr != nil {
 		return fmt.Errorf("filer store delete: %v", storeDeletionErr)
 	}
-	if entry.IsDirectory() {
-		f.cacheDelDirectory(string(entry.FullPath))
-	} else {
+	if !entry.IsDirectory() {
 		f.NotifyUpdateEvent(ctx, entry, nil, shouldDeleteChunks, isFromOtherCluster)
 	}
 
diff --git a/weed/filer2/filer_deletion.go b/weed/filer2/filer_deletion.go
index a6b229771..2ff9dac63 100644
--- a/weed/filer2/filer_deletion.go
+++ b/weed/filer2/filer_deletion.go
@@ -1,6 +1,7 @@
 package filer2
 
 import (
+	"strings"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
@@ -50,15 +51,14 @@ func (f *Filer) loopProcessingDeletion() {
 					fileIds = fileIds[:0]
 				}
 				deletionCount = len(toDeleteFileIds)
-				deleteResults, err := operation.DeleteFilesWithLookupVolumeId(f.GrpcDialOption, toDeleteFileIds, lookupFunc)
+				_, err := operation.DeleteFilesWithLookupVolumeId(f.GrpcDialOption, toDeleteFileIds, lookupFunc)
 				if err != nil {
-					glog.V(0).Infof("deleting fileIds len=%d error: %v", deletionCount, err)
+					if !strings.Contains(err.Error(), "already deleted") {
+						glog.V(0).Infof("deleting fileIds len=%d error: %v", deletionCount, err)
+					}
 				} else {
 					glog.V(1).Infof("deleting fileIds len=%d", deletionCount)
 				}
-				if len(deleteResults) != deletionCount {
-					glog.V(0).Infof("delete %d fileIds actual %d", deletionCount, len(deleteResults))
-				}
 			}
 		})
 
diff --git a/weed/filer2/leveldb/leveldb_store_test.go b/weed/filer2/leveldb/leveldb_store_test.go
index 77df07a9b..81c761f56 100644
--- a/weed/filer2/leveldb/leveldb_store_test.go
+++ b/weed/filer2/leveldb/leveldb_store_test.go
@@ -17,7 +17,6 @@ func TestCreateAndFind(t *testing.T) {
 	store := &LevelDBStore{}
 	store.initialize(dir)
 	filer.SetStore(store)
-	filer.DisableDirectoryCache()
 
 	fullpath := util.FullPath("/home/chris/this/is/one/file1.jpg")
 
@@ -72,7 +71,6 @@ func TestEmptyRoot(t *testing.T) {
 	store := &LevelDBStore{}
 	store.initialize(dir)
 	filer.SetStore(store)
-	filer.DisableDirectoryCache()
 
 	ctx := context.Background()
 
diff --git a/weed/filer2/leveldb2/leveldb2_store_test.go b/weed/filer2/leveldb2/leveldb2_store_test.go
index b211d86e4..27c1c954b 100644
--- a/weed/filer2/leveldb2/leveldb2_store_test.go
+++ b/weed/filer2/leveldb2/leveldb2_store_test.go
@@ -17,7 +17,6 @@ func TestCreateAndFind(t *testing.T) {
 	store := &LevelDB2Store{}
 	store.initialize(dir, 2)
 	filer.SetStore(store)
-	filer.DisableDirectoryCache()
 
 	fullpath := util.FullPath("/home/chris/this/is/one/file1.jpg")
 
@@ -72,7 +71,6 @@ func TestEmptyRoot(t *testing.T) {
 	store := &LevelDB2Store{}
 	store.initialize(dir, 2)
 	filer.SetStore(store)
-	filer.DisableDirectoryCache()
 
 	ctx := context.Background()
 
diff --git a/weed/filer2/reader_at.go b/weed/filer2/reader_at.go
index 568d94267..0bf528a42 100644
--- a/weed/filer2/reader_at.go
+++ b/weed/filer2/reader_at.go
@@ -15,12 +15,11 @@ import (
 type ChunkReadAt struct {
 	masterClient *wdclient.MasterClient
 	chunkViews   []*ChunkView
-	buffer       []byte
-	bufferOffset int64
 	lookupFileId func(fileId string) (targetUrl string, err error)
 	readerLock   sync.Mutex
+	fileSize     int64
 
-	chunkCache *chunk_cache.ChunkCache
+	chunkCache chunk_cache.ChunkCache
 }
 
 // var _ = io.ReaderAt(&ChunkReadAt{})
@@ -54,13 +53,13 @@ func LookupFn(filerClient filer_pb.FilerClient) LookupFileIdFunctionType {
 	}
 }
 
-func NewChunkReaderAtFromClient(filerClient filer_pb.FilerClient, chunkViews []*ChunkView, chunkCache *chunk_cache.ChunkCache) *ChunkReadAt {
+func NewChunkReaderAtFromClient(filerClient filer_pb.FilerClient, chunkViews []*ChunkView, chunkCache chunk_cache.ChunkCache, fileSize int64) *ChunkReadAt {
 
 	return &ChunkReadAt{
 		chunkViews:   chunkViews,
 		lookupFileId: LookupFn(filerClient),
-		bufferOffset: -1,
 		chunkCache:   chunkCache,
+		fileSize:     fileSize,
 	}
 }
 
@@ -69,75 +68,78 @@ func (c *ChunkReadAt) ReadAt(p []byte, offset int64) (n int, err error) {
 	c.readerLock.Lock()
 	defer c.readerLock.Unlock()
 
-	for n < len(p) && err == nil {
-		readCount, readErr := c.doReadAt(p[n:], offset+int64(n))
-		n += readCount
-		err = readErr
-		if readCount == 0 {
-			return n, io.EOF
-		}
-	}
-	return
+	glog.V(4).Infof("ReadAt [%d,%d) of total file size %d bytes %d chunk views", offset, offset+int64(len(p)), c.fileSize, len(c.chunkViews))
+	return c.doReadAt(p[n:], offset+int64(n))
 }
 
 func (c *ChunkReadAt) doReadAt(p []byte, offset int64) (n int, err error) {
 
-	var found bool
-	for _, chunk := range c.chunkViews {
-		if chunk.LogicOffset <= offset && offset < chunk.LogicOffset+int64(chunk.Size) {
-			found = true
-			if c.bufferOffset != chunk.LogicOffset {
-				c.buffer, err = c.fetchChunkData(chunk)
-				if err != nil {
-					glog.Errorf("fetching chunk %+v: %v\n", chunk, err)
-				}
-				c.bufferOffset = chunk.LogicOffset
-			}
+	var buffer []byte
+	startOffset, remaining := offset, int64(len(p))
+	for i, chunk := range c.chunkViews {
+		if remaining <= 0 {
 			break
 		}
+		if startOffset < chunk.LogicOffset {
+			gap := int(chunk.LogicOffset - startOffset)
+			glog.V(4).Infof("zero [%d,%d)", startOffset, startOffset+int64(gap))
+			n += int(min(int64(gap), remaining))
+			startOffset, remaining = chunk.LogicOffset, remaining-int64(gap)
+			if remaining <= 0 {
+				break
+			}
+		}
+		// fmt.Printf(">>> doReadAt [%d,%d), chunk[%d,%d)\n", offset, offset+int64(len(p)), chunk.LogicOffset, chunk.LogicOffset+int64(chunk.Size))
+		chunkStart, chunkStop := max(chunk.LogicOffset, startOffset), min(chunk.LogicOffset+int64(chunk.Size), startOffset+remaining)
+		if chunkStart >= chunkStop {
+			continue
+		}
+		glog.V(4).Infof("read [%d,%d), %d/%d chunk %s [%d,%d)", chunkStart, chunkStop, i, len(c.chunkViews), chunk.FileId, chunk.LogicOffset-chunk.Offset, chunk.LogicOffset-chunk.Offset+int64(chunk.Size))
+		buffer, err = c.readFromWholeChunkData(chunk)
+		if err != nil {
+			glog.Errorf("fetching chunk %+v: %v\n", chunk, err)
+			return
+		}
+		bufferOffset := chunkStart - chunk.LogicOffset + chunk.Offset
+		copied := copy(p[startOffset-offset:chunkStop-chunkStart+startOffset-offset], buffer[bufferOffset:bufferOffset+chunkStop-chunkStart])
+		n += copied
+		startOffset, remaining = startOffset+int64(copied), remaining-int64(copied)
 	}
-	if !found {
-		return 0, io.EOF
-	}
 
-	if err == nil {
-		n = copy(p, c.buffer[offset-c.bufferOffset:])
+	glog.V(4).Infof("doReadAt [%d,%d), n:%v, err:%v", offset, offset+int64(len(p)), n, err)
+
+	if err == nil && remaining > 0 && c.fileSize > startOffset {
+		delta := int(min(remaining, c.fileSize - startOffset))
+		glog.V(4).Infof("zero2 [%d,%d) of file size %d bytes", startOffset, startOffset+int64(delta), c.fileSize)
+		n += delta
 	}
 
-	// fmt.Printf("> doReadAt [%d,%d), buffer:[%d,%d)\n", offset, offset+int64(n), c.bufferOffset, c.bufferOffset+int64(len(c.buffer)))
+	if err == nil && offset+int64(len(p)) > c.fileSize {
+		err = io.EOF
+	}
+	// fmt.Printf("~~~ filled %d, err: %v\n\n", n, err)
 
 	return
 
 }
 
-func (c *ChunkReadAt) fetchChunkData(chunkView *ChunkView) (data []byte, err error) {
+func (c *ChunkReadAt) readFromWholeChunkData(chunkView *ChunkView) (chunkData []byte, err error) {
 
-	glog.V(4).Infof("fetchChunkData %s [%d,%d)\n", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size))
+	glog.V(4).Infof("readFromWholeChunkData %s offset %d [%d,%d) size at least %d", chunkView.FileId, chunkView.Offset, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size), chunkView.ChunkSize)
 
-	hasDataInCache := false
-	chunkData := c.chunkCache.GetChunk(chunkView.FileId, chunkView.ChunkSize)
+	chunkData = c.chunkCache.GetChunk(chunkView.FileId, chunkView.ChunkSize)
 	if chunkData != nil {
-		glog.V(3).Infof("cache hit %s [%d,%d)", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size))
-		hasDataInCache = true
+		glog.V(5).Infof("cache hit %s [%d,%d)", chunkView.FileId, chunkView.LogicOffset-chunkView.Offset, chunkView.LogicOffset-chunkView.Offset+int64(len(chunkData)))
 	} else {
+		glog.V(4).Infof("doFetchFullChunkData %s", chunkView.FileId)
 		chunkData, err = c.doFetchFullChunkData(chunkView.FileId, chunkView.CipherKey, chunkView.IsGzipped)
 		if err != nil {
-			return nil, err
+			return
 		}
-	}
-
-	if int64(len(chunkData)) < chunkView.Offset+int64(chunkView.Size) {
-		glog.Errorf("unexpected larger cached:%v chunk %s [%d,%d) than %d", hasDataInCache, chunkView.FileId, chunkView.Offset, chunkView.Offset+int64(chunkView.Size), len(chunkData))
-		return nil, fmt.Errorf("unexpected larger cached:%v chunk %s [%d,%d) than %d", hasDataInCache, chunkView.FileId, chunkView.Offset, chunkView.Offset+int64(chunkView.Size), len(chunkData))
-	}
-
-	data = chunkData[chunkView.Offset : chunkView.Offset+int64(chunkView.Size)]
-
-	if !hasDataInCache {
 		c.chunkCache.SetChunk(chunkView.FileId, chunkData)
 	}
 
-	return data, nil
+	return
 }
 
 func (c *ChunkReadAt) doFetchFullChunkData(fileId string, cipherKey []byte, isGzipped bool) ([]byte, error) {
diff --git a/weed/filer2/reader_at_test.go b/weed/filer2/reader_at_test.go
new file mode 100644
index 000000000..7377c5dbc
--- /dev/null
+++ b/weed/filer2/reader_at_test.go
@@ -0,0 +1,156 @@
+package filer2
+
+import (
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+	"sync"
+	"testing"
+)
+
+type mockChunkCache struct {
+}
+
+func (m *mockChunkCache) GetChunk(fileId string, minSize uint64) (data []byte) {
+	x, _ := strconv.Atoi(fileId)
+	data = make([]byte, minSize)
+	for i := 0; i < int(minSize); i++ {
+		data[i] = byte(x)
+	}
+	return data
+}
+func (m *mockChunkCache) SetChunk(fileId string, data []byte) {
+}
+
+func TestReaderAt(t *testing.T) {
+
+	visibles := []VisibleInterval{
+		{
+			start:  1,
+			stop:   2,
+			fileId: "1",
+			chunkSize: 9,
+		},
+		{
+			start:  3,
+			stop:   4,
+			fileId: "3",
+			chunkSize: 1,
+		},
+		{
+			start:  5,
+			stop:   6,
+			fileId: "5",
+			chunkSize: 2,
+		},
+		{
+			start:  7,
+			stop:   9,
+			fileId: "7",
+			chunkSize: 2,
+		},
+		{
+			start:  9,
+			stop:   10,
+			fileId: "9",
+			chunkSize: 2,
+		},
+	}
+
+	readerAt := &ChunkReadAt{
+		chunkViews:   ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
+		lookupFileId: nil,
+		readerLock:   sync.Mutex{},
+		fileSize:     10,
+		chunkCache:   &mockChunkCache{},
+	}
+
+	testReadAt(t, readerAt, 0, 10, 10, nil)
+	testReadAt(t, readerAt, 0, 12, 10, io.EOF)
+	testReadAt(t, readerAt, 2, 8, 8, nil)
+	testReadAt(t, readerAt, 3, 6, 6, nil)
+
+}
+
+func testReadAt(t *testing.T, readerAt *ChunkReadAt, offset int64, size int, expected int, expectedErr error) {
+	data := make([]byte, size)
+	n, err := readerAt.ReadAt(data, offset)
+
+	for _, d := range data {
+		fmt.Printf("%x", d)
+	}
+	fmt.Println()
+
+	if expected != n {
+		t.Errorf("unexpected read size: %d, expect: %d", n, expected)
+	}
+	if err != expectedErr {
+		t.Errorf("unexpected read error: %v, expect: %v", err, expectedErr)
+	}
+
+}
+
+func TestReaderAt0(t *testing.T) {
+
+	visibles := []VisibleInterval{
+		{
+			start:  2,
+			stop:   5,
+			fileId: "1",
+			chunkSize: 9,
+		},
+		{
+			start:  7,
+			stop:   9,
+			fileId: "2",
+			chunkSize: 9,
+		},
+	}
+
+	readerAt := &ChunkReadAt{
+		chunkViews:   ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
+		lookupFileId: nil,
+		readerLock:   sync.Mutex{},
+		fileSize:     10,
+		chunkCache:   &mockChunkCache{},
+	}
+
+	testReadAt(t, readerAt, 0, 10, 10, nil)
+	testReadAt(t, readerAt, 3, 16, 7, io.EOF)
+	testReadAt(t, readerAt, 3, 5, 5, nil)
+
+	testReadAt(t, readerAt, 11, 5, 0, io.EOF)
+	testReadAt(t, readerAt, 10, 5, 0, io.EOF)
+
+}
+
+func TestReaderAt1(t *testing.T) {
+
+	visibles := []VisibleInterval{
+		{
+			start:  2,
+			stop:   5,
+			fileId: "1",
+			chunkSize: 9,
+		},
+	}
+
+	readerAt := &ChunkReadAt{
+		chunkViews:   ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
+		lookupFileId: nil,
+		readerLock:   sync.Mutex{},
+		fileSize:     20,
+		chunkCache:   &mockChunkCache{},
+	}
+
+	testReadAt(t, readerAt, 0, 20, 20, nil)
+	testReadAt(t, readerAt, 1, 7, 7, nil)
+	testReadAt(t, readerAt, 0, 1, 1, nil)
+	testReadAt(t, readerAt, 18, 4, 2, io.EOF)
+	testReadAt(t, readerAt, 12, 4, 4, nil)
+	testReadAt(t, readerAt, 4, 20, 16, io.EOF)
+	testReadAt(t, readerAt, 4, 10, 10, nil)
+	testReadAt(t, readerAt, 1, 10, 10, nil)
+
+}
diff --git a/weed/filer2/stream.go b/weed/filer2/stream.go
index e9707d3ae..fee9d45da 100644
--- a/weed/filer2/stream.go
+++ b/weed/filer2/stream.go
@@ -32,7 +32,7 @@ func StreamContent(masterClient *wdclient.MasterClient, w io.Writer, chunks []*f
 	for _, chunkView := range chunkViews {
 
 		urlString := fileId2Url[chunkView.FileId]
-		err := util.ReadUrlAsStream(urlString, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
+		err := util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
 			w.Write(data)
 		})
 		if err != nil {
@@ -63,7 +63,7 @@ func ReadAll(masterClient *wdclient.MasterClient, chunks []*filer_pb.FileChunk)
 			glog.V(1).Infof("operation LookupFileId %s failed, err: %v", chunkView.FileId, err)
 			return nil, err
 		}
-		err = util.ReadUrlAsStream(urlString, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
+		err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
 			buffer.Write(data)
 		})
 		if err != nil {
@@ -175,7 +175,7 @@ func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
 		return err
 	}
 	var buffer bytes.Buffer
-	err = util.ReadUrlAsStream(urlString, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
+	err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
 		buffer.Write(data)
 	})
 	if err != nil {
diff --git a/weed/filesys/dir.go b/weed/filesys/dir.go
index 08332d967..46f5f22ed 100644
--- a/weed/filesys/dir.go
+++ b/weed/filesys/dir.go
@@ -63,7 +63,7 @@ func (dir *Dir) Attr(ctx context.Context, attr *fuse.Attr) error {
 	attr.Gid = dir.entry.Attributes.Gid
 	attr.Uid = dir.entry.Attributes.Uid
 
-	glog.V(4).Infof("dir Attr %s, attr: %+v", dir.FullPath(), attr)
+	glog.V(5).Infof("dir Attr %s, attr: %+v", dir.FullPath(), attr)
 
 	return nil
 }
@@ -101,7 +101,7 @@ func (dir *Dir) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
 }
 
 func (dir *Dir) newFile(name string, entry *filer_pb.Entry) fs.Node {
-	return dir.wfs.fsNodeCache.EnsureFsNode(util.NewFullPath(dir.FullPath(), name), func() fs.Node {
+	f := dir.wfs.fsNodeCache.EnsureFsNode(util.NewFullPath(dir.FullPath(), name), func() fs.Node {
 		return &File{
 			Name:           name,
 			dir:            dir,
@@ -110,14 +110,17 @@ func (dir *Dir) newFile(name string, entry *filer_pb.Entry) fs.Node {
 			entryViewCache: nil,
 		}
 	})
+	f.(*File).dir = dir // in case dir node was created later
+	return f
 }
 
 func (dir *Dir) newDirectory(fullpath util.FullPath, entry *filer_pb.Entry) fs.Node {
 
-	return dir.wfs.fsNodeCache.EnsureFsNode(fullpath, func() fs.Node {
+	d := dir.wfs.fsNodeCache.EnsureFsNode(fullpath, func() fs.Node {
 		return &Dir{name: entry.Name, wfs: dir.wfs, entry: entry, parent: dir}
 	})
-
+	d.(*Dir).parent = dir // in case dir node was created later
+	return d
 }
 
 func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
@@ -218,7 +221,7 @@ func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, err
 
 func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
 
-	glog.V(4).Infof("dir Lookup %s: %s by %s", dir.FullPath(), req.Name, req.Header.String())
+	glog.V(5).Infof("dir Lookup %s: %s by %s", dir.FullPath(), req.Name, req.Header.String())
 
 	fullFilePath := util.NewFullPath(dir.FullPath(), req.Name)
 	dirPath := util.FullPath(dir.FullPath())
@@ -237,7 +240,7 @@ func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.
 			return nil, fuse.ENOENT
 		}
 	} else {
-		glog.V(4).Infof("dir Lookup cache hit %s", fullFilePath)
+		glog.V(5).Infof("dir Lookup cache hit %s", fullFilePath)
 	}
 
 	if entry != nil {
@@ -265,7 +268,7 @@ func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.
 
 func (dir *Dir) ReadDirAll(ctx context.Context) (ret []fuse.Dirent, err error) {
 
-	glog.V(3).Infof("dir ReadDirAll %s", dir.FullPath())
+	glog.V(5).Infof("dir ReadDirAll %s", dir.FullPath())
 
 	processEachEntryFn := func(entry *filer_pb.Entry, isLast bool) error {
 		fullpath := util.NewFullPath(dir.FullPath(), entry.Name)
@@ -314,12 +317,8 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 		return nil
 	}
 
-	dir.wfs.deleteFileChunks(entry.Chunks)
-
-	dir.wfs.fsNodeCache.DeleteFsNode(filePath)
-
-	dir.wfs.metaCache.DeleteEntry(context.Background(), filePath)
 
+	// first, ensure the filer store can correctly delete
 	glog.V(3).Infof("remove file: %v", req)
 	err = filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, false, false, false, false)
 	if err != nil {
@@ -327,34 +326,40 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 		return fuse.ENOENT
 	}
 
+	// then, delete meta cache and fsNode cache
+	dir.wfs.metaCache.DeleteEntry(context.Background(), filePath)
+	dir.wfs.fsNodeCache.DeleteFsNode(filePath)
+
+	// delete the chunks last
+	dir.wfs.deleteFileChunks(entry.Chunks)
+
 	return nil
 
 }
 
 func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
 
-	t := util.NewFullPath(dir.FullPath(), req.Name)
-	dir.wfs.fsNodeCache.DeleteFsNode(t)
-
-	dir.wfs.metaCache.DeleteEntry(context.Background(), t)
-
 	glog.V(3).Infof("remove directory entry: %v", req)
 	err := filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, true, false, false, false)
 	if err != nil {
-		glog.V(3).Infof("remove %s/%s: %v", dir.FullPath(), req.Name, err)
+		glog.V(0).Infof("remove %s/%s: %v", dir.FullPath(), req.Name, err)
 		if strings.Contains(err.Error(), "non-empty"){
 			return fuse.EEXIST
 		}
 		return fuse.ENOENT
 	}
 
+	t := util.NewFullPath(dir.FullPath(), req.Name)
+	dir.wfs.metaCache.DeleteEntry(context.Background(), t)
+	dir.wfs.fsNodeCache.DeleteFsNode(t)
+
 	return nil
 
 }
 
 func (dir *Dir) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
 
-	glog.V(3).Infof("%v dir setattr %+v", dir.FullPath(), req)
+	glog.V(4).Infof("%v dir setattr %+v", dir.FullPath(), req)
 
 	if err := dir.maybeLoadEntry(); err != nil {
 		return err
@@ -429,7 +434,7 @@ func (dir *Dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp
 }
 
 func (dir *Dir) Forget() {
-	glog.V(3).Infof("Forget dir %s", dir.FullPath())
+	glog.V(5).Infof("Forget dir %s", dir.FullPath())
 
 	dir.wfs.fsNodeCache.DeleteFsNode(util.FullPath(dir.FullPath()))
 }
@@ -460,7 +465,7 @@ func (dir *Dir) saveEntry() error {
 		glog.V(1).Infof("save dir entry: %v", request)
 		_, err := client.UpdateEntry(context.Background(), request)
 		if err != nil {
-			glog.V(0).Infof("UpdateEntry dir %s/%s: %v", parentDir, name, err)
+			glog.Errorf("UpdateEntry dir %s/%s: %v", parentDir, name, err)
 			return fuse.EIO
 		}
 
diff --git a/weed/filesys/dir_link.go b/weed/filesys/dir_link.go
index 4990e743c..bd564f413 100644
--- a/weed/filesys/dir_link.go
+++ b/weed/filesys/dir_link.go
@@ -18,7 +18,7 @@ var _ = fs.NodeReadlinker(&File{})
 
 func (dir *Dir) Symlink(ctx context.Context, req *fuse.SymlinkRequest) (fs.Node, error) {
 
-	glog.V(3).Infof("Symlink: %v/%v to %v", dir.FullPath(), req.NewName, req.Target)
+	glog.V(4).Infof("Symlink: %v/%v to %v", dir.FullPath(), req.NewName, req.Target)
 
 	request := &filer_pb.CreateEntryRequest{
 		Directory: dir.FullPath(),
@@ -63,7 +63,7 @@ func (file *File) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (stri
 		return "", fuse.Errno(syscall.EINVAL)
 	}
 
-	glog.V(3).Infof("Readlink: %v/%v => %v", file.dir.FullPath(), file.Name, file.entry.Attributes.SymlinkTarget)
+	glog.V(4).Infof("Readlink: %v/%v => %v", file.dir.FullPath(), file.Name, file.entry.Attributes.SymlinkTarget)
 
 	return file.entry.Attributes.SymlinkTarget, nil
 
diff --git a/weed/filesys/dir_rename.go b/weed/filesys/dir_rename.go
index da4f1b232..0e417e0ab 100644
--- a/weed/filesys/dir_rename.go
+++ b/weed/filesys/dir_rename.go
@@ -63,7 +63,17 @@ func (dir *Dir) Rename(ctx context.Context, req *fuse.RenameRequest, newDirector
 
 	// fmt.Printf("rename path: %v => %v\n", oldPath, newPath)
 	dir.wfs.fsNodeCache.Move(oldPath, newPath)
-	delete(dir.wfs.handles, oldPath.AsInode())
+
+	// change file handle
+	dir.wfs.handlesLock.Lock()
+	defer dir.wfs.handlesLock.Unlock()
+	inodeId := oldPath.AsInode()
+	existingHandle, found := dir.wfs.handles[inodeId]
+	if !found || existingHandle == nil {
+		return err
+	}
+	delete(dir.wfs.handles, inodeId)
+	dir.wfs.handles[newPath.AsInode()] = existingHandle
 
 	return err
 }
diff --git a/weed/filesys/dirty_page.go b/weed/filesys/dirty_page.go
index 46d20e466..88a1a4f55 100644
--- a/weed/filesys/dirty_page.go
+++ b/weed/filesys/dirty_page.go
@@ -25,9 +25,6 @@ func newDirtyPages(file *File) *ContinuousDirtyPages {
 	}
 }
 
-func (pages *ContinuousDirtyPages) releaseResource() {
-}
-
 var counter = int32(0)
 
 func (pages *ContinuousDirtyPages) AddPage(offset int64, data []byte) (chunks []*filer_pb.FileChunk, err error) {
@@ -35,7 +32,7 @@ func (pages *ContinuousDirtyPages) AddPage(offset int64, data []byte) (chunks []
 	pages.lock.Lock()
 	defer pages.lock.Unlock()
 
-	glog.V(3).Infof("%s AddPage [%d,%d)", pages.f.fullpath(), offset, offset+int64(len(data)))
+	glog.V(5).Infof("%s AddPage [%d,%d) of %d bytes", pages.f.fullpath(), offset, offset+int64(len(data)), pages.f.entry.Attributes.FileSize)
 
 	if len(data) > int(pages.f.wfs.option.ChunkSizeLimit) {
 		// this is more than what buffer can hold.
@@ -121,14 +118,16 @@ func (pages *ContinuousDirtyPages) saveExistingLargestPageToStorage() (chunk *fi
 		return nil, false, nil
 	}
 
+	fileSize := int64(pages.f.entry.Attributes.FileSize)
 	for {
-		chunk, err = pages.saveToStorage(maxList.ToReader(), maxList.Offset(), maxList.Size())
+		chunkSize := min(maxList.Size(), fileSize-maxList.Offset())
+		chunk, err = pages.saveToStorage(maxList.ToReader(), maxList.Offset(), chunkSize)
 		if err == nil {
 			hasSavedData = true
-			glog.V(3).Infof("%s saveToStorage [%d,%d) %s", pages.f.fullpath(), maxList.Offset(), maxList.Offset()+maxList.Size(), chunk.FileId)
+			glog.V(4).Infof("saveToStorage %s %s [%d,%d) of %d bytes", pages.f.fullpath(), chunk.GetFileIdString(), maxList.Offset(), maxList.Offset()+chunkSize, fileSize)
 			return
 		} else {
-			glog.V(0).Infof("%s saveToStorage [%d,%d): %v", pages.f.fullpath(), maxList.Offset(), maxList.Offset()+maxList.Size(), err)
+			glog.V(0).Infof("%s saveToStorage [%d,%d): %v", pages.f.fullpath(), maxList.Offset(), maxList.Offset()+chunkSize, err)
 			time.Sleep(5 * time.Second)
 		}
 	}
@@ -139,6 +138,7 @@ func (pages *ContinuousDirtyPages) saveToStorage(reader io.Reader, offset int64,
 
 	dir, _ := pages.f.fullpath().DirAndName()
 
+	reader = io.LimitReader(reader, size)
 	chunk, collection, replication, err := pages.f.wfs.saveDataAsChunk(dir)(reader, pages.f.Name, offset)
 	if err != nil {
 		return nil, err
@@ -149,6 +149,13 @@ func (pages *ContinuousDirtyPages) saveToStorage(reader io.Reader, offset int64,
 
 }
 
+func maxUint64(x, y uint64) uint64 {
+	if x > y {
+		return x
+	}
+	return y
+}
+
 func max(x, y int64) int64 {
 	if x > y {
 		return x
@@ -162,11 +169,11 @@ func min(x, y int64) int64 {
 	return y
 }
 
-func (pages *ContinuousDirtyPages) ReadDirtyData(data []byte, startOffset int64) (offset int64, size int) {
+func (pages *ContinuousDirtyPages) ReadDirtyDataAt(data []byte, startOffset int64) (maxStop int64) {
 
 	pages.lock.Lock()
 	defer pages.lock.Unlock()
 
-	return pages.intervals.ReadData(data, startOffset)
+	return pages.intervals.ReadDataAt(data, startOffset)
 
 }
diff --git a/weed/filesys/dirty_page_interval.go b/weed/filesys/dirty_page_interval.go
index ec94c6df1..afa2755ed 100644
--- a/weed/filesys/dirty_page_interval.go
+++ b/weed/filesys/dirty_page_interval.go
@@ -3,7 +3,6 @@ package filesys
 import (
 	"bytes"
 	"io"
-	"math"
 )
 
 type IntervalNode struct {
@@ -186,25 +185,15 @@ func (c *ContinuousIntervals) removeList(target *IntervalLinkedList) {
 
 }
 
-func (c *ContinuousIntervals) ReadData(data []byte, startOffset int64) (offset int64, size int) {
-	var minOffset int64 = math.MaxInt64
-	var maxStop int64
+func (c *ContinuousIntervals) ReadDataAt(data []byte, startOffset int64) (maxStop int64) {
 	for _, list := range c.lists {
 		start := max(startOffset, list.Offset())
 		stop := min(startOffset+int64(len(data)), list.Offset()+list.Size())
-		if start <= stop {
+		if start < stop {
 			list.ReadData(data[start-startOffset:], start, stop)
-			minOffset = min(minOffset, start)
 			maxStop = max(maxStop, stop)
 		}
 	}
-
-	if minOffset == math.MaxInt64 {
-		return 0, 0
-	}
-
-	offset = minOffset
-	size = int(maxStop - offset)
 	return
 }
 
diff --git a/weed/filesys/file.go b/weed/filesys/file.go
index dcda93522..d57f6cc57 100644
--- a/weed/filesys/file.go
+++ b/weed/filesys/file.go
@@ -7,12 +7,13 @@ import (
 	"sort"
 	"time"
 
+	"github.com/seaweedfs/fuse"
+	"github.com/seaweedfs/fuse/fs"
+
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/seaweedfs/fuse"
-	"github.com/seaweedfs/fuse/fs"
 )
 
 const blockSize = 512
@@ -35,6 +36,7 @@ type File struct {
 	entryViewCache []filer2.VisibleInterval
 	isOpen         int
 	reader         io.ReaderAt
+	dirtyMetadata  bool
 }
 
 func (file *File) fullpath() util.FullPath {
@@ -43,7 +45,7 @@ func (file *File) fullpath() util.FullPath {
 
 func (file *File) Attr(ctx context.Context, attr *fuse.Attr) error {
 
-	glog.V(4).Infof("file Attr %s, open:%v, existing attr: %+v", file.fullpath(), file.isOpen, attr)
+	glog.V(5).Infof("file Attr %s, open:%v, existing attr: %+v", file.fullpath(), file.isOpen, attr)
 
 	if file.isOpen <= 0 {
 		if err := file.maybeLoadEntry(ctx); err != nil {
@@ -54,7 +56,7 @@ func (file *File) Attr(ctx context.Context, attr *fuse.Attr) error {
 	attr.Inode = file.fullpath().AsInode()
 	attr.Valid = time.Second
 	attr.Mode = os.FileMode(file.entry.Attributes.FileMode)
-	attr.Size = filer2.TotalSize(file.entry.Chunks)
+	attr.Size = filer2.FileSize(file.entry)
 	if file.isOpen > 0 {
 		attr.Size = file.entry.Attributes.FileSize
 		glog.V(4).Infof("file Attr %s, open:%v, size: %d", file.fullpath(), file.isOpen, attr.Size)
@@ -91,7 +93,7 @@ func (file *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.Op
 
 	resp.Handle = fuse.HandleID(handle.handle)
 
-	glog.V(3).Infof("%v file open handle id = %d", file.fullpath(), handle.handle)
+	glog.V(4).Infof("%v file open handle id = %d", file.fullpath(), handle.handle)
 
 	return handle, nil
 
@@ -99,7 +101,7 @@ func (file *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.Op
 
 func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
 
-	glog.V(3).Infof("%v file setattr %+v, old:%+v", file.fullpath(), req, file.entry.Attributes)
+	glog.V(5).Infof("%v file setattr %+v", file.fullpath(), req)
 
 	if err := file.maybeLoadEntry(ctx); err != nil {
 		return err
@@ -107,49 +109,72 @@ func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *f
 
 	if req.Valid.Size() {
 
-		glog.V(3).Infof("%v file setattr set size=%v", file.fullpath(), req.Size)
+		glog.V(4).Infof("%v file setattr set size=%v chunks=%d", file.fullpath(), req.Size, len(file.entry.Chunks))
 		if req.Size < filer2.TotalSize(file.entry.Chunks) {
 			// fmt.Printf("truncate %v \n", fullPath)
 			var chunks []*filer_pb.FileChunk
+			var truncatedChunks []*filer_pb.FileChunk
 			for _, chunk := range file.entry.Chunks {
 				int64Size := int64(chunk.Size)
 				if chunk.Offset+int64Size > int64(req.Size) {
+					// this chunk is truncated
 					int64Size = int64(req.Size) - chunk.Offset
-				}
-				if int64Size > 0 {
-					chunks = append(chunks, chunk)
+					if int64Size > 0 {
+						chunks = append(chunks, chunk)
+						glog.V(4).Infof("truncated chunk %+v from %d to %d\n", chunk.GetFileIdString(), chunk.Size, int64Size)
+						chunk.Size = uint64(int64Size)
+					} else {
+						glog.V(4).Infof("truncated whole chunk %+v\n", chunk.GetFileIdString())
+						truncatedChunks = append(truncatedChunks, chunk)
+					}
 				}
 			}
+			file.wfs.deleteFileChunks(truncatedChunks)
 			file.entry.Chunks = chunks
 			file.entryViewCache = nil
 			file.reader = nil
 		}
 		file.entry.Attributes.FileSize = req.Size
+		file.dirtyMetadata = true
 	}
+
 	if req.Valid.Mode() {
 		file.entry.Attributes.FileMode = uint32(req.Mode)
+		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Uid() {
 		file.entry.Attributes.Uid = req.Uid
+		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Gid() {
 		file.entry.Attributes.Gid = req.Gid
+		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Crtime() {
 		file.entry.Attributes.Crtime = req.Crtime.Unix()
+		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Mtime() {
 		file.entry.Attributes.Mtime = req.Mtime.Unix()
+		file.dirtyMetadata = true
+	}
+
+	if req.Valid.Handle() {
+		// fmt.Printf("file handle => %d\n", req.Handle)
 	}
 
 	if file.isOpen > 0 {
 		return nil
 	}
 
+	if !file.dirtyMetadata {
+		return nil
+	}
+
 	return file.saveEntry()
 
 }
@@ -205,14 +230,14 @@ func (file *File) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, res
 func (file *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
 	// fsync works at OS level
 	// write the file chunks to the filerGrpcAddress
-	glog.V(3).Infof("%s/%s fsync file %+v", file.dir.FullPath(), file.Name, req)
+	glog.V(4).Infof("%s/%s fsync file %+v", file.dir.FullPath(), file.Name, req)
 
 	return nil
 }
 
 func (file *File) Forget() {
 	t := util.NewFullPath(file.dir.FullPath(), file.Name)
-	glog.V(3).Infof("Forget file %s", t)
+	glog.V(5).Infof("Forget file %s", t)
 	file.wfs.fsNodeCache.DeleteFsNode(t)
 }
 
@@ -246,7 +271,7 @@ func (file *File) addChunks(chunks []*filer_pb.FileChunk) {
 
 	file.reader = nil
 
-	glog.V(3).Infof("%s existing %d chunks adds %d more", file.fullpath(), len(file.entry.Chunks), len(chunks))
+	glog.V(4).Infof("%s existing %d chunks adds %d more", file.fullpath(), len(file.entry.Chunks), len(chunks))
 
 	file.entry.Chunks = append(file.entry.Chunks, chunks...)
 }
@@ -265,10 +290,10 @@ func (file *File) saveEntry() error {
 			Entry:     file.entry,
 		}
 
-		glog.V(1).Infof("save file entry: %v", request)
+		glog.V(4).Infof("save file entry: %v", request)
 		_, err := client.UpdateEntry(context.Background(), request)
 		if err != nil {
-			glog.V(0).Infof("UpdateEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err)
+			glog.Errorf("UpdateEntry file %s/%s: %v", file.dir.FullPath(), file.Name, err)
 			return fuse.EIO
 		}
 
diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index b9d224fb2..94590f842 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -19,10 +19,9 @@ import (
 
 type FileHandle struct {
 	// cache file has been written to
-	dirtyPages    *ContinuousDirtyPages
-	contentType   string
-	dirtyMetadata bool
-	handle        uint64
+	dirtyPages  *ContinuousDirtyPages
+	contentType string
+	handle      uint64
 
 	f         *File
 	RequestId fuse.RequestID // unique ID for request
@@ -40,7 +39,7 @@ func newFileHandle(file *File, uid, gid uint32) *FileHandle {
 		Gid:        gid,
 	}
 	if fh.f.entry != nil {
-		fh.f.entry.Attributes.FileSize = filer2.TotalSize(fh.f.entry.Chunks)
+		fh.f.entry.Attributes.FileSize = filer2.FileSize(fh.f.entry)
 	}
 	return fh
 }
@@ -55,38 +54,45 @@ var _ = fs.HandleReleaser(&FileHandle{})
 
 func (fh *FileHandle) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadResponse) error {
 
-	glog.V(4).Infof("%s read fh %d: [%d,%d)", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size))
+	glog.V(4).Infof("%s read fh %d: [%d,%d) size %d resp.Data cap=%d", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size), req.Size, cap(resp.Data))
 
-	buff := make([]byte, req.Size)
+	buff := resp.Data[:cap(resp.Data)]
+	if req.Size > cap(resp.Data) {
+		// should not happen
+		buff = make([]byte, req.Size)
+	}
 
 	totalRead, err := fh.readFromChunks(buff, req.Offset)
 	if err == nil {
-		dirtyOffset, dirtySize := fh.readFromDirtyPages(buff, req.Offset)
-		if totalRead+req.Offset < dirtyOffset+int64(dirtySize) {
-			totalRead = dirtyOffset + int64(dirtySize) - req.Offset
-		}
+		maxStop := fh.readFromDirtyPages(buff, req.Offset)
+		totalRead = max(maxStop - req.Offset, totalRead)
 	}
 
-	resp.Data = buff[:totalRead]
-
 	if err != nil {
 		glog.Errorf("file handle read %s: %v", fh.f.fullpath(), err)
 		return fuse.EIO
 	}
 
+	if totalRead > int64(len(buff)) {
+		glog.Warningf("%s FileHandle Read %d: [%d,%d) size %d totalRead %d", fh.f.fullpath(), fh.handle, req.Offset, req.Offset+int64(req.Size), req.Size, totalRead)
+		totalRead = min(int64(len(buff)), totalRead)
+	}
+	resp.Data = buff[:totalRead]
+
 	return err
 }
 
-func (fh *FileHandle) readFromDirtyPages(buff []byte, startOffset int64) (offset int64, size int) {
-	return fh.dirtyPages.ReadDirtyData(buff, startOffset)
+func (fh *FileHandle) readFromDirtyPages(buff []byte, startOffset int64) (maxStop int64) {
+	return fh.dirtyPages.ReadDirtyDataAt(buff, startOffset)
 }
 
 func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, error) {
 
-	// this value should come from the filer instead of the old f
-	if len(fh.f.entry.Chunks) == 0 {
+	fileSize := int64(filer2.FileSize(fh.f.entry))
+
+	if fileSize == 0 {
 		glog.V(1).Infof("empty fh %v", fh.f.fullpath())
-		return 0, nil
+		return 0, io.EOF
 	}
 
 	var chunkResolveErr error
@@ -99,8 +105,8 @@ func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, error) {
 	}
 
 	if fh.f.reader == nil {
-		chunkViews := filer2.ViewFromVisibleIntervals(fh.f.entryViewCache, 0, math.MaxInt32)
-		fh.f.reader = filer2.NewChunkReaderAtFromClient(fh.f.wfs, chunkViews, fh.f.wfs.chunkCache)
+		chunkViews := filer2.ViewFromVisibleIntervals(fh.f.entryViewCache, 0, math.MaxInt64)
+		fh.f.reader = filer2.NewChunkReaderAtFromClient(fh.f.wfs, chunkViews, fh.f.wfs.chunkCache, fileSize)
 	}
 
 	totalRead, err := fh.f.reader.ReadAt(buff, offset)
@@ -113,7 +119,7 @@ func (fh *FileHandle) readFromChunks(buff []byte, offset int64) (int64, error) {
 		glog.Errorf("file handle read %s: %v", fh.f.fullpath(), err)
 	}
 
-	// glog.V(0).Infof("file handle read %s [%d,%d] %d : %v", fh.f.fullpath(), offset, offset+int64(totalRead), totalRead, err)
+	glog.V(4).Infof("file handle read %s [%d,%d] %d : %v", fh.f.fullpath(), offset, offset+int64(totalRead), totalRead, err)
 
 	return int64(totalRead), err
 }
@@ -126,7 +132,7 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 	copy(data, req.Data)
 
 	fh.f.entry.Attributes.FileSize = uint64(max(req.Offset+int64(len(data)), int64(fh.f.entry.Attributes.FileSize)))
-	// glog.V(0).Infof("%v write [%d,%d)", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)))
+	glog.V(4).Infof("%v write [%d,%d) %d", fh.f.fullpath(), req.Offset, req.Offset+int64(len(req.Data)), len(req.Data))
 
 	chunks, err := fh.dirtyPages.AddPage(req.Offset, data)
 	if err != nil {
@@ -139,14 +145,14 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 	if req.Offset == 0 {
 		// detect mime type
 		fh.contentType = http.DetectContentType(data)
-		fh.dirtyMetadata = true
+		fh.f.dirtyMetadata = true
 	}
 
 	if len(chunks) > 0 {
 
 		fh.f.addChunks(chunks)
 
-		fh.dirtyMetadata = true
+		fh.f.dirtyMetadata = true
 	}
 
 	return nil
@@ -154,24 +160,28 @@ func (fh *FileHandle) Write(ctx context.Context, req *fuse.WriteRequest, resp *f
 
 func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
 
-	glog.V(4).Infof("%v release fh %d", fh.f.fullpath(), fh.handle)
+	glog.V(4).Infof("Release %v fh %d", fh.f.fullpath(), fh.handle)
 
 	fh.f.isOpen--
 
 	if fh.f.isOpen <= 0 {
-		fh.dirtyPages.releaseResource()
+		fh.doFlush(ctx, req.Header)
 		fh.f.wfs.ReleaseHandle(fh.f.fullpath(), fuse.HandleID(fh.handle))
+		fh.f.entryViewCache = nil
+		fh.f.reader = nil
 	}
-	fh.f.entryViewCache = nil
-	fh.f.reader = nil
 
 	return nil
 }
 
 func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
+	return fh.doFlush(ctx, req.Header)
+}
+
+func (fh *FileHandle) doFlush(ctx context.Context, header fuse.Header) error {
 	// fflush works at fh level
 	// send the data to the OS
-	glog.V(4).Infof("%s fh %d flush %v", fh.f.fullpath(), fh.handle, req)
+	glog.V(4).Infof("doFlush %s fh %d %v", fh.f.fullpath(), fh.handle, header)
 
 	chunks, err := fh.dirtyPages.FlushToStorage()
 	if err != nil {
@@ -181,10 +191,10 @@ func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 
 	if len(chunks) > 0 {
 		fh.f.addChunks(chunks)
-		fh.dirtyMetadata = true
+		fh.f.dirtyMetadata = true
 	}
 
-	if !fh.dirtyMetadata {
+	if !fh.f.dirtyMetadata {
 		return nil
 	}
 
@@ -193,10 +203,10 @@ func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 		if fh.f.entry.Attributes != nil {
 			fh.f.entry.Attributes.Mime = fh.contentType
 			if fh.f.entry.Attributes.Uid == 0 {
-				fh.f.entry.Attributes.Uid = req.Uid
+				fh.f.entry.Attributes.Uid = header.Uid
 			}
 			if fh.f.entry.Attributes.Gid == 0 {
-				fh.f.entry.Attributes.Gid = req.Gid
+				fh.f.entry.Attributes.Gid = header.Gid
 			}
 			if fh.f.entry.Attributes.Crtime == 0 {
 				fh.f.entry.Attributes.Crtime = time.Now().Unix()
@@ -212,9 +222,9 @@ func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 			Entry:     fh.f.entry,
 		}
 
-		glog.V(3).Infof("%s set chunks: %v", fh.f.fullpath(), len(fh.f.entry.Chunks))
+		glog.V(4).Infof("%s set chunks: %v", fh.f.fullpath(), len(fh.f.entry.Chunks))
 		for i, chunk := range fh.f.entry.Chunks {
-			glog.V(3).Infof("%s chunks %d: %v [%d,%d)", fh.f.fullpath(), i, chunk.FileId, chunk.Offset, chunk.Offset+int64(chunk.Size))
+			glog.V(4).Infof("%s chunks %d: %v [%d,%d)", fh.f.fullpath(), i, chunk.GetFileIdString(), chunk.Offset, chunk.Offset+int64(chunk.Size))
 		}
 
 		chunks, garbages := filer2.CompactFileChunks(filer2.LookupFn(fh.f.wfs), fh.f.entry.Chunks)
@@ -239,14 +249,14 @@ func (fh *FileHandle) Flush(ctx context.Context, req *fuse.FlushRequest) error {
 
 		fh.f.wfs.deleteFileChunks(garbages)
 		for i, chunk := range garbages {
-			glog.V(3).Infof("garbage %s chunks %d: %v [%d,%d)", fh.f.fullpath(), i, chunk.FileId, chunk.Offset, chunk.Offset+int64(chunk.Size))
+			glog.V(4).Infof("garbage %s chunks %d: %v [%d,%d)", fh.f.fullpath(), i, chunk.GetFileIdString(), chunk.Offset, chunk.Offset+int64(chunk.Size))
 		}
 
 		return nil
 	})
 
 	if err == nil {
-		fh.dirtyMetadata = false
+		fh.f.dirtyMetadata = false
 	}
 
 	if err != nil {
diff --git a/weed/filesys/fscache.go b/weed/filesys/fscache.go
index b146f0615..fdec8253c 100644
--- a/weed/filesys/fscache.go
+++ b/weed/filesys/fscache.go
@@ -3,8 +3,9 @@ package filesys
 import (
 	"sync"
 
-	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/seaweedfs/fuse/fs"
+
+	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 type FsCache struct {
@@ -118,7 +119,6 @@ func (c *FsCache) Move(oldPath util.FullPath, newPath util.FullPath) *FsNode {
 		target = target.ensureChild(p)
 	}
 	parent := target.parent
-	src.name = target.name
 	if dir, ok := src.node.(*Dir); ok {
 		dir.name = target.name // target is not Dir, but a shortcut
 	}
@@ -132,6 +132,7 @@ func (c *FsCache) Move(oldPath util.FullPath, newPath util.FullPath) *FsNode {
 
 	target.deleteSelf()
 
+	src.name = target.name
 	src.connectToParent(parent)
 
 	return src
@@ -144,10 +145,14 @@ func (n *FsNode) connectToParent(parent *FsNode) {
 		oldNode.deleteSelf()
 	}
 	if dir, ok := n.node.(*Dir); ok {
-		dir.parent = parent.node.(*Dir)
+		if parent.node != nil {
+			dir.parent = parent.node.(*Dir)
+		}
 	}
 	if f, ok := n.node.(*File); ok {
-		f.dir = parent.node.(*Dir)
+		if parent.node != nil {
+			f.dir = parent.node.(*Dir)
+		}
 	}
 	n.childrenLock.Lock()
 	parent.children[n.name] = n
diff --git a/weed/filesys/fscache_test.go b/weed/filesys/fscache_test.go
index 67f9aacc8..8bfae1472 100644
--- a/weed/filesys/fscache_test.go
+++ b/weed/filesys/fscache_test.go
@@ -94,3 +94,24 @@ func TestFsCacheMove(t *testing.T) {
 	}
 
 }
+
+
+func TestFsCacheMove2(t *testing.T) {
+
+	cache := newFsCache(nil)
+
+	cache.SetFsNode(util.FullPath("/a/b/d"), &File{Name: "dd"})
+	cache.SetFsNode(util.FullPath("/a/b/e"), &File{Name: "ee"})
+
+	cache.Move(util.FullPath("/a/b/d"), util.FullPath("/a/b/e"))
+
+	d := cache.GetFsNode(util.FullPath("/a/b/e"))
+	if d == nil {
+		t.Errorf("unexpected nil node!")
+	}
+	if d.(*File).Name != "e" {
+		t.Errorf("unexpected node!")
+	}
+
+}
+
diff --git a/weed/filesys/meta_cache/meta_cache.go b/weed/filesys/meta_cache/meta_cache.go
index edf329143..15ec0903d 100644
--- a/weed/filesys/meta_cache/meta_cache.go
+++ b/weed/filesys/meta_cache/meta_cache.go
@@ -61,8 +61,13 @@ func (mc *MetaCache) AtomicUpdateEntry(ctx context.Context, oldPath util.FullPat
 	oldDir, _ := oldPath.DirAndName()
 	if mc.visitedBoundary.HasVisited(util.FullPath(oldDir)) {
 		if oldPath != "" {
-			if err := mc.actualStore.DeleteEntry(ctx, oldPath); err != nil {
-				return err
+			if newEntry != nil && oldPath == newEntry.FullPath {
+				// skip the unnecessary deletion
+				// leave the update to the following InsertEntry operation
+			} else {
+				if err := mc.actualStore.DeleteEntry(ctx, oldPath); err != nil {
+					return err
+				}
 			}
 		}
 	} else {
diff --git a/weed/filesys/meta_cache/meta_cache_init.go b/weed/filesys/meta_cache/meta_cache_init.go
index e119ebff5..cd98f4a7c 100644
--- a/weed/filesys/meta_cache/meta_cache_init.go
+++ b/weed/filesys/meta_cache/meta_cache_init.go
@@ -14,7 +14,7 @@ func EnsureVisited(mc *MetaCache, client filer_pb.FilerClient, dirPath util.Full
 
 	mc.visitedBoundary.EnsureVisited(dirPath, func(path util.FullPath) (childDirectories []string, err error) {
 
-		glog.V(2).Infof("ReadDirAllEntries %s ...", path)
+		glog.V(5).Infof("ReadDirAllEntries %s ...", path)
 
 		err = filer_pb.ReadDirAllEntries(client, dirPath, "", func(pbEntry *filer_pb.Entry, isLast bool) error {
 			entry := filer2.FromPbEntry(string(dirPath), pbEntry)
diff --git a/weed/filesys/wfs.go b/weed/filesys/wfs.go
index 22f0b655a..f147d7548 100644
--- a/weed/filesys/wfs.go
+++ b/weed/filesys/wfs.go
@@ -65,7 +65,7 @@ type WFS struct {
 	root        fs.Node
 	fsNodeCache *FsCache
 
-	chunkCache *chunk_cache.ChunkCache
+	chunkCache *chunk_cache.TieredChunkCache
 	metaCache  *meta_cache.MetaCache
 }
 type statsCache struct {
@@ -87,10 +87,7 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 	cacheDir := path.Join(option.CacheDir, cacheUniqueId)
 	if option.CacheSizeMB > 0 {
 		os.MkdirAll(cacheDir, 0755)
-		wfs.chunkCache = chunk_cache.NewChunkCache(256, cacheDir, option.CacheSizeMB)
-		grace.OnInterrupt(func() {
-			wfs.chunkCache.Shutdown()
-		})
+		wfs.chunkCache = chunk_cache.NewTieredChunkCache(256, cacheDir, option.CacheSizeMB)
 	}
 
 	wfs.metaCache = meta_cache.NewMetaCache(path.Join(cacheDir, "meta"))
@@ -113,7 +110,7 @@ func (wfs *WFS) Root() (fs.Node, error) {
 func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (fileHandle *FileHandle) {
 
 	fullpath := file.fullpath()
-	glog.V(4).Infof("%s AcquireHandle uid=%d gid=%d", fullpath, uid, gid)
+	glog.V(4).Infof("AcquireHandle %s uid=%d gid=%d", fullpath, uid, gid)
 
 	wfs.handlesLock.Lock()
 	defer wfs.handlesLock.Unlock()
@@ -127,7 +124,6 @@ func (wfs *WFS) AcquireHandle(file *File, uid, gid uint32) (fileHandle *FileHand
 	fileHandle = newFileHandle(file, uid, gid)
 	wfs.handles[inodeId] = fileHandle
 	fileHandle.handle = inodeId
-	glog.V(4).Infof("%s new fh %d", fullpath, fileHandle.handle)
 
 	return
 }
@@ -146,7 +142,7 @@ func (wfs *WFS) ReleaseHandle(fullpath util.FullPath, handleId fuse.HandleID) {
 // Statfs is called to obtain file system metadata. Implements fuse.FSStatfser
 func (wfs *WFS) Statfs(ctx context.Context, req *fuse.StatfsRequest, resp *fuse.StatfsResponse) error {
 
-	glog.V(4).Infof("reading fs stats: %+v", req)
+	glog.V(5).Infof("reading fs stats: %+v", req)
 
 	if wfs.stats.lastChecked < time.Now().Unix()-20 {
 
@@ -158,13 +154,13 @@ func (wfs *WFS) Statfs(ctx context.Context, req *fuse.StatfsRequest, resp *fuse.
 				Ttl:         fmt.Sprintf("%ds", wfs.option.TtlSec),
 			}
 
-			glog.V(4).Infof("reading filer stats: %+v", request)
+			glog.V(5).Infof("reading filer stats: %+v", request)
 			resp, err := client.Statistics(context.Background(), request)
 			if err != nil {
 				glog.V(0).Infof("reading filer stats %v: %v", request, err)
 				return err
 			}
-			glog.V(4).Infof("read filer stats: %+v", resp)
+			glog.V(5).Infof("read filer stats: %+v", resp)
 
 			wfs.stats.TotalSize = resp.TotalSize
 			wfs.stats.UsedSize = resp.UsedSize
diff --git a/weed/filesys/wfs_deletion.go b/weed/filesys/wfs_deletion.go
index bf21b1808..203ebdad1 100644
--- a/weed/filesys/wfs_deletion.go
+++ b/weed/filesys/wfs_deletion.go
@@ -38,7 +38,7 @@ func (wfs *WFS) deleteFileIds(grpcDialOption grpc.DialOption, client filer_pb.Se
 
 		m := make(map[string]operation.LookupResult)
 
-		glog.V(4).Infof("remove file lookup volume id locations: %v", vids)
+		glog.V(5).Infof("deleteFileIds lookup volume id locations: %v", vids)
 		resp, err := client.LookupVolume(context.Background(), &filer_pb.LookupVolumeRequest{
 			VolumeIds: vids,
 		})
diff --git a/weed/operation/upload_content.go b/weed/operation/upload_content.go
index 6fd8a60d1..f59c7e1a9 100644
--- a/weed/operation/upload_content.go
+++ b/weed/operation/upload_content.go
@@ -33,6 +33,7 @@ type UploadResult struct {
 }
 
 func (uploadResult *UploadResult) ToPbFileChunk(fileId string, offset int64) *filer_pb.FileChunk {
+	fid, _ := filer_pb.ToFileIdObject(fileId)
 	return &filer_pb.FileChunk{
 		FileId:       fileId,
 		Offset:       offset,
@@ -41,6 +42,7 @@ func (uploadResult *UploadResult) ToPbFileChunk(fileId string, offset int64) *fi
 		ETag:         uploadResult.ETag,
 		CipherKey:    uploadResult.CipherKey,
 		IsCompressed: uploadResult.Gzip > 0,
+		Fid:          fid,
 	}
 }
 
@@ -63,7 +65,7 @@ var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
 
 // Upload sends a POST request to a volume server to upload the content with adjustable compression level
 func UploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputCompressed bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
-	uploadResult, err = doUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
+	uploadResult, err = retriedUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
 	return
 }
 
@@ -79,10 +81,22 @@ func doUpload(uploadUrl string, filename string, cipher bool, reader io.Reader,
 		err = fmt.Errorf("read input: %v", err)
 		return
 	}
-	uploadResult, uploadErr := doUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
+	uploadResult, uploadErr := retriedUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
 	return uploadResult, uploadErr, data
 }
 
+func retriedUploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputCompressed bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
+	for i := 0; i < 3; i++ {
+		uploadResult, err = doUploadData(uploadUrl, filename, cipher, data, isInputCompressed, mtype, pairMap, jwt)
+		if err == nil {
+			return
+		} else {
+			glog.Warningf("uploading to %s: %v", uploadUrl, err)
+		}
+	}
+	return
+}
+
 func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, isInputCompressed bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (uploadResult *UploadResult, err error) {
 	contentIsGzipped := isInputCompressed
 	shouldGzipNow := false
diff --git a/weed/pb/filer_pb/filer_client.go b/weed/pb/filer_pb/filer_client.go
index 535a3c247..c5a8c311a 100644
--- a/weed/pb/filer_pb/filer_client.go
+++ b/weed/pb/filer_pb/filer_client.go
@@ -7,6 +7,7 @@ import (
 	"io"
 	"math"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
@@ -82,7 +83,7 @@ func doList(filerClient FilerClient, fullDirPath util.FullPath, prefix string, f
 			InclusiveStartFrom: inclusive,
 		}
 
-		glog.V(3).Infof("read directory: %v", request)
+		glog.V(5).Infof("read directory: %v", request)
 		ctx, cancel := context.WithCancel(context.Background())
 		stream, err := client.ListEntries(ctx, request)
 		if err != nil {
@@ -224,9 +225,15 @@ func Remove(filerClient FilerClient, parentDirectoryPath, name string, isDeleteD
 			IgnoreRecursiveError: ignoreRecursiveErr,
 			IsFromOtherCluster:   isFromOtherCluster,
 		}); err != nil {
+			if strings.Contains(err.Error(), ErrNotFound.Error()){
+				return nil
+			}
 			return err
 		} else {
 			if resp.Error != "" {
+				if strings.Contains(resp.Error, ErrNotFound.Error()){
+					return nil
+				}
 				return errors.New(resp.Error)
 			}
 		}
diff --git a/weed/pb/filer_pb/filer_pb_helper.go b/weed/pb/filer_pb/filer_pb_helper.go
index 96ab2154f..0ca00d981 100644
--- a/weed/pb/filer_pb/filer_pb_helper.go
+++ b/weed/pb/filer_pb/filer_pb_helper.go
@@ -10,7 +10,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 )
 
-func toFileIdObject(fileIdStr string) (*FileId, error) {
+func ToFileIdObject(fileIdStr string) (*FileId, error) {
 	t, err := needle.ParseFileIdFromString(fileIdStr)
 	if err != nil {
 		return nil, err
@@ -43,14 +43,14 @@ func BeforeEntrySerialization(chunks []*FileChunk) {
 	for _, chunk := range chunks {
 
 		if chunk.FileId != "" {
-			if fid, err := toFileIdObject(chunk.FileId); err == nil {
+			if fid, err := ToFileIdObject(chunk.FileId); err == nil {
 				chunk.Fid = fid
 				chunk.FileId = ""
 			}
 		}
 
 		if chunk.SourceFileId != "" {
-			if fid, err := toFileIdObject(chunk.SourceFileId); err == nil {
+			if fid, err := ToFileIdObject(chunk.SourceFileId); err == nil {
 				chunk.SourceFid = fid
 				chunk.SourceFileId = ""
 			}
@@ -81,7 +81,7 @@ func CreateEntry(client SeaweedFilerClient, request *CreateEntryRequest) error {
 		return fmt.Errorf("CreateEntry: %v", err)
 	}
 	if resp.Error != "" {
-		glog.V(1).Infof("create entry %s/%s %v: %v", request.Directory, request.Entry.Name, request.OExcl, err)
+		glog.V(1).Infof("create entry %s/%s %v: %v", request.Directory, request.Entry.Name, request.OExcl, resp.Error)
 		return fmt.Errorf("CreateEntry : %v", resp.Error)
 	}
 	return nil
diff --git a/weed/pb/filer_pb/filer_pb_helper_test.go b/weed/pb/filer_pb/filer_pb_helper_test.go
index d4468c011..0009afdbe 100644
--- a/weed/pb/filer_pb/filer_pb_helper_test.go
+++ b/weed/pb/filer_pb/filer_pb_helper_test.go
@@ -9,7 +9,7 @@ import (
 func TestFileIdSize(t *testing.T) {
 	fileIdStr := "11745,0293434534cbb9892b"
 
-	fid, _ := toFileIdObject(fileIdStr)
+	fid, _ := ToFileIdObject(fileIdStr)
 	bytes, _ := proto.Marshal(fid)
 
 	println(len(fileIdStr))
diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index 480a04671..2121cc3cc 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -37,8 +37,12 @@ service VolumeServer {
     }
     rpc VolumeMarkReadonly (VolumeMarkReadonlyRequest) returns (VolumeMarkReadonlyResponse) {
     }
+    rpc VolumeMarkWritable (VolumeMarkWritableRequest) returns (VolumeMarkWritableResponse) {
+    }
     rpc VolumeConfigure (VolumeConfigureRequest) returns (VolumeConfigureResponse) {
     }
+    rpc VolumeStatus (VolumeStatusRequest) returns (VolumeStatusResponse) {
+    }
 
     // copy the .idx .dat files, and mount this volume
     rpc VolumeCopy (VolumeCopyRequest) returns (VolumeCopyResponse) {
@@ -200,6 +204,12 @@ message VolumeMarkReadonlyRequest {
 message VolumeMarkReadonlyResponse {
 }
 
+message VolumeMarkWritableRequest {
+    uint32 volume_id = 1;
+}
+message VolumeMarkWritableResponse {
+}
+
 message VolumeConfigureRequest {
     uint32 volume_id = 1;
     string replication = 2;
@@ -208,6 +218,13 @@ message VolumeConfigureResponse {
     string error = 1;
 }
 
+message VolumeStatusRequest {
+    uint32 volume_id = 1;
+}
+message VolumeStatusResponse {
+    bool is_read_only = 1;
+}
+
 message VolumeCopyRequest {
     uint32 volume_id = 1;
     string collection = 2;
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index 870758108..bf12d5edb 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -1408,6 +1408,91 @@ func (*VolumeMarkReadonlyResponse) Descriptor() ([]byte, []int) {
 	return file_volume_server_proto_rawDescGZIP(), []int{27}
 }
 
+type VolumeMarkWritableRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId,proto3" json:"volume_id,omitempty"`
+}
+
+func (x *VolumeMarkWritableRequest) Reset() {
+	*x = VolumeMarkWritableRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[28]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VolumeMarkWritableRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VolumeMarkWritableRequest) ProtoMessage() {}
+
+func (x *VolumeMarkWritableRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[28]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VolumeMarkWritableRequest.ProtoReflect.Descriptor instead.
+func (*VolumeMarkWritableRequest) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{28}
+}
+
+func (x *VolumeMarkWritableRequest) GetVolumeId() uint32 {
+	if x != nil {
+		return x.VolumeId
+	}
+	return 0
+}
+
+type VolumeMarkWritableResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *VolumeMarkWritableResponse) Reset() {
+	*x = VolumeMarkWritableResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[29]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VolumeMarkWritableResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VolumeMarkWritableResponse) ProtoMessage() {}
+
+func (x *VolumeMarkWritableResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[29]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VolumeMarkWritableResponse.ProtoReflect.Descriptor instead.
+func (*VolumeMarkWritableResponse) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{29}
+}
+
 type VolumeConfigureRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1420,7 +1505,7 @@ type VolumeConfigureRequest struct {
 func (x *VolumeConfigureRequest) Reset() {
 	*x = VolumeConfigureRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[28]
+		mi := &file_volume_server_proto_msgTypes[30]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1433,7 +1518,7 @@ func (x *VolumeConfigureRequest) String() string {
 func (*VolumeConfigureRequest) ProtoMessage() {}
 
 func (x *VolumeConfigureRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[28]
+	mi := &file_volume_server_proto_msgTypes[30]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1446,7 +1531,7 @@ func (x *VolumeConfigureRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeConfigureRequest.ProtoReflect.Descriptor instead.
 func (*VolumeConfigureRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{28}
+	return file_volume_server_proto_rawDescGZIP(), []int{30}
 }
 
 func (x *VolumeConfigureRequest) GetVolumeId() uint32 {
@@ -1474,7 +1559,7 @@ type VolumeConfigureResponse struct {
 func (x *VolumeConfigureResponse) Reset() {
 	*x = VolumeConfigureResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[29]
+		mi := &file_volume_server_proto_msgTypes[31]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1487,7 +1572,7 @@ func (x *VolumeConfigureResponse) String() string {
 func (*VolumeConfigureResponse) ProtoMessage() {}
 
 func (x *VolumeConfigureResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[29]
+	mi := &file_volume_server_proto_msgTypes[31]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1500,7 +1585,7 @@ func (x *VolumeConfigureResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeConfigureResponse.ProtoReflect.Descriptor instead.
 func (*VolumeConfigureResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{29}
+	return file_volume_server_proto_rawDescGZIP(), []int{31}
 }
 
 func (x *VolumeConfigureResponse) GetError() string {
@@ -1510,6 +1595,100 @@ func (x *VolumeConfigureResponse) GetError() string {
 	return ""
 }
 
+type VolumeStatusRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	VolumeId uint32 `protobuf:"varint,1,opt,name=volume_id,json=volumeId,proto3" json:"volume_id,omitempty"`
+}
+
+func (x *VolumeStatusRequest) Reset() {
+	*x = VolumeStatusRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[32]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VolumeStatusRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VolumeStatusRequest) ProtoMessage() {}
+
+func (x *VolumeStatusRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[32]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VolumeStatusRequest.ProtoReflect.Descriptor instead.
+func (*VolumeStatusRequest) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{32}
+}
+
+func (x *VolumeStatusRequest) GetVolumeId() uint32 {
+	if x != nil {
+		return x.VolumeId
+	}
+	return 0
+}
+
+type VolumeStatusResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	IsReadOnly bool `protobuf:"varint,1,opt,name=is_read_only,json=isReadOnly,proto3" json:"is_read_only,omitempty"`
+}
+
+func (x *VolumeStatusResponse) Reset() {
+	*x = VolumeStatusResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_volume_server_proto_msgTypes[33]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VolumeStatusResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VolumeStatusResponse) ProtoMessage() {}
+
+func (x *VolumeStatusResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[33]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VolumeStatusResponse.ProtoReflect.Descriptor instead.
+func (*VolumeStatusResponse) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{33}
+}
+
+func (x *VolumeStatusResponse) GetIsReadOnly() bool {
+	if x != nil {
+		return x.IsReadOnly
+	}
+	return false
+}
+
 type VolumeCopyRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1525,7 +1704,7 @@ type VolumeCopyRequest struct {
 func (x *VolumeCopyRequest) Reset() {
 	*x = VolumeCopyRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[30]
+		mi := &file_volume_server_proto_msgTypes[34]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1538,7 +1717,7 @@ func (x *VolumeCopyRequest) String() string {
 func (*VolumeCopyRequest) ProtoMessage() {}
 
 func (x *VolumeCopyRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[30]
+	mi := &file_volume_server_proto_msgTypes[34]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1551,7 +1730,7 @@ func (x *VolumeCopyRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeCopyRequest.ProtoReflect.Descriptor instead.
 func (*VolumeCopyRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{30}
+	return file_volume_server_proto_rawDescGZIP(), []int{34}
 }
 
 func (x *VolumeCopyRequest) GetVolumeId() uint32 {
@@ -1600,7 +1779,7 @@ type VolumeCopyResponse struct {
 func (x *VolumeCopyResponse) Reset() {
 	*x = VolumeCopyResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[31]
+		mi := &file_volume_server_proto_msgTypes[35]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1613,7 +1792,7 @@ func (x *VolumeCopyResponse) String() string {
 func (*VolumeCopyResponse) ProtoMessage() {}
 
 func (x *VolumeCopyResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[31]
+	mi := &file_volume_server_proto_msgTypes[35]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1626,7 +1805,7 @@ func (x *VolumeCopyResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeCopyResponse.ProtoReflect.Descriptor instead.
 func (*VolumeCopyResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{31}
+	return file_volume_server_proto_rawDescGZIP(), []int{35}
 }
 
 func (x *VolumeCopyResponse) GetLastAppendAtNs() uint64 {
@@ -1653,7 +1832,7 @@ type CopyFileRequest struct {
 func (x *CopyFileRequest) Reset() {
 	*x = CopyFileRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[32]
+		mi := &file_volume_server_proto_msgTypes[36]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1666,7 +1845,7 @@ func (x *CopyFileRequest) String() string {
 func (*CopyFileRequest) ProtoMessage() {}
 
 func (x *CopyFileRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[32]
+	mi := &file_volume_server_proto_msgTypes[36]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1679,7 +1858,7 @@ func (x *CopyFileRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CopyFileRequest.ProtoReflect.Descriptor instead.
 func (*CopyFileRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{32}
+	return file_volume_server_proto_rawDescGZIP(), []int{36}
 }
 
 func (x *CopyFileRequest) GetVolumeId() uint32 {
@@ -1742,7 +1921,7 @@ type CopyFileResponse struct {
 func (x *CopyFileResponse) Reset() {
 	*x = CopyFileResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[33]
+		mi := &file_volume_server_proto_msgTypes[37]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1755,7 +1934,7 @@ func (x *CopyFileResponse) String() string {
 func (*CopyFileResponse) ProtoMessage() {}
 
 func (x *CopyFileResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[33]
+	mi := &file_volume_server_proto_msgTypes[37]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1768,7 +1947,7 @@ func (x *CopyFileResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CopyFileResponse.ProtoReflect.Descriptor instead.
 func (*CopyFileResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{33}
+	return file_volume_server_proto_rawDescGZIP(), []int{37}
 }
 
 func (x *CopyFileResponse) GetFileContent() []byte {
@@ -1791,7 +1970,7 @@ type VolumeTailSenderRequest struct {
 func (x *VolumeTailSenderRequest) Reset() {
 	*x = VolumeTailSenderRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[34]
+		mi := &file_volume_server_proto_msgTypes[38]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1804,7 +1983,7 @@ func (x *VolumeTailSenderRequest) String() string {
 func (*VolumeTailSenderRequest) ProtoMessage() {}
 
 func (x *VolumeTailSenderRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[34]
+	mi := &file_volume_server_proto_msgTypes[38]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1817,7 +1996,7 @@ func (x *VolumeTailSenderRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeTailSenderRequest.ProtoReflect.Descriptor instead.
 func (*VolumeTailSenderRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{34}
+	return file_volume_server_proto_rawDescGZIP(), []int{38}
 }
 
 func (x *VolumeTailSenderRequest) GetVolumeId() uint32 {
@@ -1854,7 +2033,7 @@ type VolumeTailSenderResponse struct {
 func (x *VolumeTailSenderResponse) Reset() {
 	*x = VolumeTailSenderResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[35]
+		mi := &file_volume_server_proto_msgTypes[39]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1867,7 +2046,7 @@ func (x *VolumeTailSenderResponse) String() string {
 func (*VolumeTailSenderResponse) ProtoMessage() {}
 
 func (x *VolumeTailSenderResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[35]
+	mi := &file_volume_server_proto_msgTypes[39]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1880,7 +2059,7 @@ func (x *VolumeTailSenderResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeTailSenderResponse.ProtoReflect.Descriptor instead.
 func (*VolumeTailSenderResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{35}
+	return file_volume_server_proto_rawDescGZIP(), []int{39}
 }
 
 func (x *VolumeTailSenderResponse) GetNeedleHeader() []byte {
@@ -1918,7 +2097,7 @@ type VolumeTailReceiverRequest struct {
 func (x *VolumeTailReceiverRequest) Reset() {
 	*x = VolumeTailReceiverRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[36]
+		mi := &file_volume_server_proto_msgTypes[40]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1931,7 +2110,7 @@ func (x *VolumeTailReceiverRequest) String() string {
 func (*VolumeTailReceiverRequest) ProtoMessage() {}
 
 func (x *VolumeTailReceiverRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[36]
+	mi := &file_volume_server_proto_msgTypes[40]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1944,7 +2123,7 @@ func (x *VolumeTailReceiverRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeTailReceiverRequest.ProtoReflect.Descriptor instead.
 func (*VolumeTailReceiverRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{36}
+	return file_volume_server_proto_rawDescGZIP(), []int{40}
 }
 
 func (x *VolumeTailReceiverRequest) GetVolumeId() uint32 {
@@ -1984,7 +2163,7 @@ type VolumeTailReceiverResponse struct {
 func (x *VolumeTailReceiverResponse) Reset() {
 	*x = VolumeTailReceiverResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[37]
+		mi := &file_volume_server_proto_msgTypes[41]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1997,7 +2176,7 @@ func (x *VolumeTailReceiverResponse) String() string {
 func (*VolumeTailReceiverResponse) ProtoMessage() {}
 
 func (x *VolumeTailReceiverResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[37]
+	mi := &file_volume_server_proto_msgTypes[41]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2010,7 +2189,7 @@ func (x *VolumeTailReceiverResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeTailReceiverResponse.ProtoReflect.Descriptor instead.
 func (*VolumeTailReceiverResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{37}
+	return file_volume_server_proto_rawDescGZIP(), []int{41}
 }
 
 type VolumeEcShardsGenerateRequest struct {
@@ -2025,7 +2204,7 @@ type VolumeEcShardsGenerateRequest struct {
 func (x *VolumeEcShardsGenerateRequest) Reset() {
 	*x = VolumeEcShardsGenerateRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[38]
+		mi := &file_volume_server_proto_msgTypes[42]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2038,7 +2217,7 @@ func (x *VolumeEcShardsGenerateRequest) String() string {
 func (*VolumeEcShardsGenerateRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsGenerateRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[38]
+	mi := &file_volume_server_proto_msgTypes[42]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2051,7 +2230,7 @@ func (x *VolumeEcShardsGenerateRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsGenerateRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsGenerateRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{38}
+	return file_volume_server_proto_rawDescGZIP(), []int{42}
 }
 
 func (x *VolumeEcShardsGenerateRequest) GetVolumeId() uint32 {
@@ -2077,7 +2256,7 @@ type VolumeEcShardsGenerateResponse struct {
 func (x *VolumeEcShardsGenerateResponse) Reset() {
 	*x = VolumeEcShardsGenerateResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[39]
+		mi := &file_volume_server_proto_msgTypes[43]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2090,7 +2269,7 @@ func (x *VolumeEcShardsGenerateResponse) String() string {
 func (*VolumeEcShardsGenerateResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsGenerateResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[39]
+	mi := &file_volume_server_proto_msgTypes[43]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2103,7 +2282,7 @@ func (x *VolumeEcShardsGenerateResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsGenerateResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsGenerateResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{39}
+	return file_volume_server_proto_rawDescGZIP(), []int{43}
 }
 
 type VolumeEcShardsRebuildRequest struct {
@@ -2118,7 +2297,7 @@ type VolumeEcShardsRebuildRequest struct {
 func (x *VolumeEcShardsRebuildRequest) Reset() {
 	*x = VolumeEcShardsRebuildRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[40]
+		mi := &file_volume_server_proto_msgTypes[44]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2131,7 +2310,7 @@ func (x *VolumeEcShardsRebuildRequest) String() string {
 func (*VolumeEcShardsRebuildRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsRebuildRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[40]
+	mi := &file_volume_server_proto_msgTypes[44]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2144,7 +2323,7 @@ func (x *VolumeEcShardsRebuildRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsRebuildRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsRebuildRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{40}
+	return file_volume_server_proto_rawDescGZIP(), []int{44}
 }
 
 func (x *VolumeEcShardsRebuildRequest) GetVolumeId() uint32 {
@@ -2172,7 +2351,7 @@ type VolumeEcShardsRebuildResponse struct {
 func (x *VolumeEcShardsRebuildResponse) Reset() {
 	*x = VolumeEcShardsRebuildResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[41]
+		mi := &file_volume_server_proto_msgTypes[45]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2185,7 +2364,7 @@ func (x *VolumeEcShardsRebuildResponse) String() string {
 func (*VolumeEcShardsRebuildResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsRebuildResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[41]
+	mi := &file_volume_server_proto_msgTypes[45]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2198,7 +2377,7 @@ func (x *VolumeEcShardsRebuildResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsRebuildResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsRebuildResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{41}
+	return file_volume_server_proto_rawDescGZIP(), []int{45}
 }
 
 func (x *VolumeEcShardsRebuildResponse) GetRebuiltShardIds() []uint32 {
@@ -2225,7 +2404,7 @@ type VolumeEcShardsCopyRequest struct {
 func (x *VolumeEcShardsCopyRequest) Reset() {
 	*x = VolumeEcShardsCopyRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[42]
+		mi := &file_volume_server_proto_msgTypes[46]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2238,7 +2417,7 @@ func (x *VolumeEcShardsCopyRequest) String() string {
 func (*VolumeEcShardsCopyRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsCopyRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[42]
+	mi := &file_volume_server_proto_msgTypes[46]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2251,7 +2430,7 @@ func (x *VolumeEcShardsCopyRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsCopyRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsCopyRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{42}
+	return file_volume_server_proto_rawDescGZIP(), []int{46}
 }
 
 func (x *VolumeEcShardsCopyRequest) GetVolumeId() uint32 {
@@ -2312,7 +2491,7 @@ type VolumeEcShardsCopyResponse struct {
 func (x *VolumeEcShardsCopyResponse) Reset() {
 	*x = VolumeEcShardsCopyResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[43]
+		mi := &file_volume_server_proto_msgTypes[47]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2325,7 +2504,7 @@ func (x *VolumeEcShardsCopyResponse) String() string {
 func (*VolumeEcShardsCopyResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsCopyResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[43]
+	mi := &file_volume_server_proto_msgTypes[47]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2338,7 +2517,7 @@ func (x *VolumeEcShardsCopyResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsCopyResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsCopyResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{43}
+	return file_volume_server_proto_rawDescGZIP(), []int{47}
 }
 
 type VolumeEcShardsDeleteRequest struct {
@@ -2354,7 +2533,7 @@ type VolumeEcShardsDeleteRequest struct {
 func (x *VolumeEcShardsDeleteRequest) Reset() {
 	*x = VolumeEcShardsDeleteRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[44]
+		mi := &file_volume_server_proto_msgTypes[48]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2367,7 +2546,7 @@ func (x *VolumeEcShardsDeleteRequest) String() string {
 func (*VolumeEcShardsDeleteRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsDeleteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[44]
+	mi := &file_volume_server_proto_msgTypes[48]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2380,7 +2559,7 @@ func (x *VolumeEcShardsDeleteRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsDeleteRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsDeleteRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{44}
+	return file_volume_server_proto_rawDescGZIP(), []int{48}
 }
 
 func (x *VolumeEcShardsDeleteRequest) GetVolumeId() uint32 {
@@ -2413,7 +2592,7 @@ type VolumeEcShardsDeleteResponse struct {
 func (x *VolumeEcShardsDeleteResponse) Reset() {
 	*x = VolumeEcShardsDeleteResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[45]
+		mi := &file_volume_server_proto_msgTypes[49]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2426,7 +2605,7 @@ func (x *VolumeEcShardsDeleteResponse) String() string {
 func (*VolumeEcShardsDeleteResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsDeleteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[45]
+	mi := &file_volume_server_proto_msgTypes[49]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2439,7 +2618,7 @@ func (x *VolumeEcShardsDeleteResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsDeleteResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsDeleteResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{45}
+	return file_volume_server_proto_rawDescGZIP(), []int{49}
 }
 
 type VolumeEcShardsMountRequest struct {
@@ -2455,7 +2634,7 @@ type VolumeEcShardsMountRequest struct {
 func (x *VolumeEcShardsMountRequest) Reset() {
 	*x = VolumeEcShardsMountRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[46]
+		mi := &file_volume_server_proto_msgTypes[50]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2468,7 +2647,7 @@ func (x *VolumeEcShardsMountRequest) String() string {
 func (*VolumeEcShardsMountRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsMountRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[46]
+	mi := &file_volume_server_proto_msgTypes[50]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2481,7 +2660,7 @@ func (x *VolumeEcShardsMountRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsMountRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsMountRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{46}
+	return file_volume_server_proto_rawDescGZIP(), []int{50}
 }
 
 func (x *VolumeEcShardsMountRequest) GetVolumeId() uint32 {
@@ -2514,7 +2693,7 @@ type VolumeEcShardsMountResponse struct {
 func (x *VolumeEcShardsMountResponse) Reset() {
 	*x = VolumeEcShardsMountResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[47]
+		mi := &file_volume_server_proto_msgTypes[51]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2527,7 +2706,7 @@ func (x *VolumeEcShardsMountResponse) String() string {
 func (*VolumeEcShardsMountResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsMountResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[47]
+	mi := &file_volume_server_proto_msgTypes[51]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2540,7 +2719,7 @@ func (x *VolumeEcShardsMountResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsMountResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsMountResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{47}
+	return file_volume_server_proto_rawDescGZIP(), []int{51}
 }
 
 type VolumeEcShardsUnmountRequest struct {
@@ -2555,7 +2734,7 @@ type VolumeEcShardsUnmountRequest struct {
 func (x *VolumeEcShardsUnmountRequest) Reset() {
 	*x = VolumeEcShardsUnmountRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[48]
+		mi := &file_volume_server_proto_msgTypes[52]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2568,7 +2747,7 @@ func (x *VolumeEcShardsUnmountRequest) String() string {
 func (*VolumeEcShardsUnmountRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsUnmountRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[48]
+	mi := &file_volume_server_proto_msgTypes[52]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2581,7 +2760,7 @@ func (x *VolumeEcShardsUnmountRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsUnmountRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsUnmountRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{48}
+	return file_volume_server_proto_rawDescGZIP(), []int{52}
 }
 
 func (x *VolumeEcShardsUnmountRequest) GetVolumeId() uint32 {
@@ -2607,7 +2786,7 @@ type VolumeEcShardsUnmountResponse struct {
 func (x *VolumeEcShardsUnmountResponse) Reset() {
 	*x = VolumeEcShardsUnmountResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[49]
+		mi := &file_volume_server_proto_msgTypes[53]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2620,7 +2799,7 @@ func (x *VolumeEcShardsUnmountResponse) String() string {
 func (*VolumeEcShardsUnmountResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsUnmountResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[49]
+	mi := &file_volume_server_proto_msgTypes[53]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2633,7 +2812,7 @@ func (x *VolumeEcShardsUnmountResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsUnmountResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsUnmountResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{49}
+	return file_volume_server_proto_rawDescGZIP(), []int{53}
 }
 
 type VolumeEcShardReadRequest struct {
@@ -2651,7 +2830,7 @@ type VolumeEcShardReadRequest struct {
 func (x *VolumeEcShardReadRequest) Reset() {
 	*x = VolumeEcShardReadRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[50]
+		mi := &file_volume_server_proto_msgTypes[54]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2664,7 +2843,7 @@ func (x *VolumeEcShardReadRequest) String() string {
 func (*VolumeEcShardReadRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardReadRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[50]
+	mi := &file_volume_server_proto_msgTypes[54]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2677,7 +2856,7 @@ func (x *VolumeEcShardReadRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardReadRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardReadRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{50}
+	return file_volume_server_proto_rawDescGZIP(), []int{54}
 }
 
 func (x *VolumeEcShardReadRequest) GetVolumeId() uint32 {
@@ -2727,7 +2906,7 @@ type VolumeEcShardReadResponse struct {
 func (x *VolumeEcShardReadResponse) Reset() {
 	*x = VolumeEcShardReadResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[51]
+		mi := &file_volume_server_proto_msgTypes[55]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2740,7 +2919,7 @@ func (x *VolumeEcShardReadResponse) String() string {
 func (*VolumeEcShardReadResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardReadResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[51]
+	mi := &file_volume_server_proto_msgTypes[55]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2753,7 +2932,7 @@ func (x *VolumeEcShardReadResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardReadResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardReadResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{51}
+	return file_volume_server_proto_rawDescGZIP(), []int{55}
 }
 
 func (x *VolumeEcShardReadResponse) GetData() []byte {
@@ -2784,7 +2963,7 @@ type VolumeEcBlobDeleteRequest struct {
 func (x *VolumeEcBlobDeleteRequest) Reset() {
 	*x = VolumeEcBlobDeleteRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[52]
+		mi := &file_volume_server_proto_msgTypes[56]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2797,7 +2976,7 @@ func (x *VolumeEcBlobDeleteRequest) String() string {
 func (*VolumeEcBlobDeleteRequest) ProtoMessage() {}
 
 func (x *VolumeEcBlobDeleteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[52]
+	mi := &file_volume_server_proto_msgTypes[56]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2810,7 +2989,7 @@ func (x *VolumeEcBlobDeleteRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcBlobDeleteRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcBlobDeleteRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{52}
+	return file_volume_server_proto_rawDescGZIP(), []int{56}
 }
 
 func (x *VolumeEcBlobDeleteRequest) GetVolumeId() uint32 {
@@ -2850,7 +3029,7 @@ type VolumeEcBlobDeleteResponse struct {
 func (x *VolumeEcBlobDeleteResponse) Reset() {
 	*x = VolumeEcBlobDeleteResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[53]
+		mi := &file_volume_server_proto_msgTypes[57]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2863,7 +3042,7 @@ func (x *VolumeEcBlobDeleteResponse) String() string {
 func (*VolumeEcBlobDeleteResponse) ProtoMessage() {}
 
 func (x *VolumeEcBlobDeleteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[53]
+	mi := &file_volume_server_proto_msgTypes[57]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2876,7 +3055,7 @@ func (x *VolumeEcBlobDeleteResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcBlobDeleteResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcBlobDeleteResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{53}
+	return file_volume_server_proto_rawDescGZIP(), []int{57}
 }
 
 type VolumeEcShardsToVolumeRequest struct {
@@ -2891,7 +3070,7 @@ type VolumeEcShardsToVolumeRequest struct {
 func (x *VolumeEcShardsToVolumeRequest) Reset() {
 	*x = VolumeEcShardsToVolumeRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[54]
+		mi := &file_volume_server_proto_msgTypes[58]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2904,7 +3083,7 @@ func (x *VolumeEcShardsToVolumeRequest) String() string {
 func (*VolumeEcShardsToVolumeRequest) ProtoMessage() {}
 
 func (x *VolumeEcShardsToVolumeRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[54]
+	mi := &file_volume_server_proto_msgTypes[58]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2917,7 +3096,7 @@ func (x *VolumeEcShardsToVolumeRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsToVolumeRequest.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsToVolumeRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{54}
+	return file_volume_server_proto_rawDescGZIP(), []int{58}
 }
 
 func (x *VolumeEcShardsToVolumeRequest) GetVolumeId() uint32 {
@@ -2943,7 +3122,7 @@ type VolumeEcShardsToVolumeResponse struct {
 func (x *VolumeEcShardsToVolumeResponse) Reset() {
 	*x = VolumeEcShardsToVolumeResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[55]
+		mi := &file_volume_server_proto_msgTypes[59]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2956,7 +3135,7 @@ func (x *VolumeEcShardsToVolumeResponse) String() string {
 func (*VolumeEcShardsToVolumeResponse) ProtoMessage() {}
 
 func (x *VolumeEcShardsToVolumeResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[55]
+	mi := &file_volume_server_proto_msgTypes[59]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2969,7 +3148,7 @@ func (x *VolumeEcShardsToVolumeResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeEcShardsToVolumeResponse.ProtoReflect.Descriptor instead.
 func (*VolumeEcShardsToVolumeResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{55}
+	return file_volume_server_proto_rawDescGZIP(), []int{59}
 }
 
 type ReadVolumeFileStatusRequest struct {
@@ -2983,7 +3162,7 @@ type ReadVolumeFileStatusRequest struct {
 func (x *ReadVolumeFileStatusRequest) Reset() {
 	*x = ReadVolumeFileStatusRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[56]
+		mi := &file_volume_server_proto_msgTypes[60]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2996,7 +3175,7 @@ func (x *ReadVolumeFileStatusRequest) String() string {
 func (*ReadVolumeFileStatusRequest) ProtoMessage() {}
 
 func (x *ReadVolumeFileStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[56]
+	mi := &file_volume_server_proto_msgTypes[60]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3009,7 +3188,7 @@ func (x *ReadVolumeFileStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReadVolumeFileStatusRequest.ProtoReflect.Descriptor instead.
 func (*ReadVolumeFileStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{56}
+	return file_volume_server_proto_rawDescGZIP(), []int{60}
 }
 
 func (x *ReadVolumeFileStatusRequest) GetVolumeId() uint32 {
@@ -3037,7 +3216,7 @@ type ReadVolumeFileStatusResponse struct {
 func (x *ReadVolumeFileStatusResponse) Reset() {
 	*x = ReadVolumeFileStatusResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[57]
+		mi := &file_volume_server_proto_msgTypes[61]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3050,7 +3229,7 @@ func (x *ReadVolumeFileStatusResponse) String() string {
 func (*ReadVolumeFileStatusResponse) ProtoMessage() {}
 
 func (x *ReadVolumeFileStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[57]
+	mi := &file_volume_server_proto_msgTypes[61]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3063,7 +3242,7 @@ func (x *ReadVolumeFileStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ReadVolumeFileStatusResponse.ProtoReflect.Descriptor instead.
 func (*ReadVolumeFileStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{57}
+	return file_volume_server_proto_rawDescGZIP(), []int{61}
 }
 
 func (x *ReadVolumeFileStatusResponse) GetVolumeId() uint32 {
@@ -3138,7 +3317,7 @@ type DiskStatus struct {
 func (x *DiskStatus) Reset() {
 	*x = DiskStatus{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[58]
+		mi := &file_volume_server_proto_msgTypes[62]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3151,7 +3330,7 @@ func (x *DiskStatus) String() string {
 func (*DiskStatus) ProtoMessage() {}
 
 func (x *DiskStatus) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[58]
+	mi := &file_volume_server_proto_msgTypes[62]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3164,7 +3343,7 @@ func (x *DiskStatus) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DiskStatus.ProtoReflect.Descriptor instead.
 func (*DiskStatus) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{58}
+	return file_volume_server_proto_rawDescGZIP(), []int{62}
 }
 
 func (x *DiskStatus) GetDir() string {
@@ -3226,7 +3405,7 @@ type MemStatus struct {
 func (x *MemStatus) Reset() {
 	*x = MemStatus{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[59]
+		mi := &file_volume_server_proto_msgTypes[63]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3239,7 +3418,7 @@ func (x *MemStatus) String() string {
 func (*MemStatus) ProtoMessage() {}
 
 func (x *MemStatus) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[59]
+	mi := &file_volume_server_proto_msgTypes[63]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3252,7 +3431,7 @@ func (x *MemStatus) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MemStatus.ProtoReflect.Descriptor instead.
 func (*MemStatus) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{59}
+	return file_volume_server_proto_rawDescGZIP(), []int{63}
 }
 
 func (x *MemStatus) GetGoroutines() int32 {
@@ -3322,7 +3501,7 @@ type RemoteFile struct {
 func (x *RemoteFile) Reset() {
 	*x = RemoteFile{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[60]
+		mi := &file_volume_server_proto_msgTypes[64]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3335,7 +3514,7 @@ func (x *RemoteFile) String() string {
 func (*RemoteFile) ProtoMessage() {}
 
 func (x *RemoteFile) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[60]
+	mi := &file_volume_server_proto_msgTypes[64]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3348,7 +3527,7 @@ func (x *RemoteFile) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RemoteFile.ProtoReflect.Descriptor instead.
 func (*RemoteFile) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{60}
+	return file_volume_server_proto_rawDescGZIP(), []int{64}
 }
 
 func (x *RemoteFile) GetBackendType() string {
@@ -3413,7 +3592,7 @@ type VolumeInfo struct {
 func (x *VolumeInfo) Reset() {
 	*x = VolumeInfo{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[61]
+		mi := &file_volume_server_proto_msgTypes[65]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3426,7 +3605,7 @@ func (x *VolumeInfo) String() string {
 func (*VolumeInfo) ProtoMessage() {}
 
 func (x *VolumeInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[61]
+	mi := &file_volume_server_proto_msgTypes[65]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3439,7 +3618,7 @@ func (x *VolumeInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeInfo.ProtoReflect.Descriptor instead.
 func (*VolumeInfo) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{61}
+	return file_volume_server_proto_rawDescGZIP(), []int{65}
 }
 
 func (x *VolumeInfo) GetFiles() []*RemoteFile {
@@ -3477,7 +3656,7 @@ type VolumeTierMoveDatToRemoteRequest struct {
 func (x *VolumeTierMoveDatToRemoteRequest) Reset() {
 	*x = VolumeTierMoveDatToRemoteRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[62]
+		mi := &file_volume_server_proto_msgTypes[66]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3490,7 +3669,7 @@ func (x *VolumeTierMoveDatToRemoteRequest) String() string {
 func (*VolumeTierMoveDatToRemoteRequest) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatToRemoteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[62]
+	mi := &file_volume_server_proto_msgTypes[66]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3503,7 +3682,7 @@ func (x *VolumeTierMoveDatToRemoteRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeTierMoveDatToRemoteRequest.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatToRemoteRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{62}
+	return file_volume_server_proto_rawDescGZIP(), []int{66}
 }
 
 func (x *VolumeTierMoveDatToRemoteRequest) GetVolumeId() uint32 {
@@ -3546,7 +3725,7 @@ type VolumeTierMoveDatToRemoteResponse struct {
 func (x *VolumeTierMoveDatToRemoteResponse) Reset() {
 	*x = VolumeTierMoveDatToRemoteResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[63]
+		mi := &file_volume_server_proto_msgTypes[67]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3559,7 +3738,7 @@ func (x *VolumeTierMoveDatToRemoteResponse) String() string {
 func (*VolumeTierMoveDatToRemoteResponse) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatToRemoteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[63]
+	mi := &file_volume_server_proto_msgTypes[67]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3572,7 +3751,7 @@ func (x *VolumeTierMoveDatToRemoteResponse) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use VolumeTierMoveDatToRemoteResponse.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatToRemoteResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{63}
+	return file_volume_server_proto_rawDescGZIP(), []int{67}
 }
 
 func (x *VolumeTierMoveDatToRemoteResponse) GetProcessed() int64 {
@@ -3602,7 +3781,7 @@ type VolumeTierMoveDatFromRemoteRequest struct {
 func (x *VolumeTierMoveDatFromRemoteRequest) Reset() {
 	*x = VolumeTierMoveDatFromRemoteRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[64]
+		mi := &file_volume_server_proto_msgTypes[68]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3615,7 +3794,7 @@ func (x *VolumeTierMoveDatFromRemoteRequest) String() string {
 func (*VolumeTierMoveDatFromRemoteRequest) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatFromRemoteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[64]
+	mi := &file_volume_server_proto_msgTypes[68]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3628,7 +3807,7 @@ func (x *VolumeTierMoveDatFromRemoteRequest) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use VolumeTierMoveDatFromRemoteRequest.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatFromRemoteRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{64}
+	return file_volume_server_proto_rawDescGZIP(), []int{68}
 }
 
 func (x *VolumeTierMoveDatFromRemoteRequest) GetVolumeId() uint32 {
@@ -3664,7 +3843,7 @@ type VolumeTierMoveDatFromRemoteResponse struct {
 func (x *VolumeTierMoveDatFromRemoteResponse) Reset() {
 	*x = VolumeTierMoveDatFromRemoteResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[65]
+		mi := &file_volume_server_proto_msgTypes[69]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3677,7 +3856,7 @@ func (x *VolumeTierMoveDatFromRemoteResponse) String() string {
 func (*VolumeTierMoveDatFromRemoteResponse) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatFromRemoteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[65]
+	mi := &file_volume_server_proto_msgTypes[69]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3690,7 +3869,7 @@ func (x *VolumeTierMoveDatFromRemoteResponse) ProtoReflect() protoreflect.Messag
 
 // Deprecated: Use VolumeTierMoveDatFromRemoteResponse.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatFromRemoteResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{65}
+	return file_volume_server_proto_rawDescGZIP(), []int{69}
 }
 
 func (x *VolumeTierMoveDatFromRemoteResponse) GetProcessed() int64 {
@@ -3716,7 +3895,7 @@ type VolumeServerStatusRequest struct {
 func (x *VolumeServerStatusRequest) Reset() {
 	*x = VolumeServerStatusRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[66]
+		mi := &file_volume_server_proto_msgTypes[70]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3729,7 +3908,7 @@ func (x *VolumeServerStatusRequest) String() string {
 func (*VolumeServerStatusRequest) ProtoMessage() {}
 
 func (x *VolumeServerStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[66]
+	mi := &file_volume_server_proto_msgTypes[70]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3742,7 +3921,7 @@ func (x *VolumeServerStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeServerStatusRequest.ProtoReflect.Descriptor instead.
 func (*VolumeServerStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{66}
+	return file_volume_server_proto_rawDescGZIP(), []int{70}
 }
 
 type VolumeServerStatusResponse struct {
@@ -3757,7 +3936,7 @@ type VolumeServerStatusResponse struct {
 func (x *VolumeServerStatusResponse) Reset() {
 	*x = VolumeServerStatusResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[67]
+		mi := &file_volume_server_proto_msgTypes[71]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3770,7 +3949,7 @@ func (x *VolumeServerStatusResponse) String() string {
 func (*VolumeServerStatusResponse) ProtoMessage() {}
 
 func (x *VolumeServerStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[67]
+	mi := &file_volume_server_proto_msgTypes[71]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3783,7 +3962,7 @@ func (x *VolumeServerStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeServerStatusResponse.ProtoReflect.Descriptor instead.
 func (*VolumeServerStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{67}
+	return file_volume_server_proto_rawDescGZIP(), []int{71}
 }
 
 func (x *VolumeServerStatusResponse) GetDiskStatuses() []*DiskStatus {
@@ -3816,7 +3995,7 @@ type QueryRequest struct {
 func (x *QueryRequest) Reset() {
 	*x = QueryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[68]
+		mi := &file_volume_server_proto_msgTypes[72]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3829,7 +4008,7 @@ func (x *QueryRequest) String() string {
 func (*QueryRequest) ProtoMessage() {}
 
 func (x *QueryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[68]
+	mi := &file_volume_server_proto_msgTypes[72]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3842,7 +4021,7 @@ func (x *QueryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest.ProtoReflect.Descriptor instead.
 func (*QueryRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68}
+	return file_volume_server_proto_rawDescGZIP(), []int{72}
 }
 
 func (x *QueryRequest) GetSelections() []string {
@@ -3891,7 +4070,7 @@ type QueriedStripe struct {
 func (x *QueriedStripe) Reset() {
 	*x = QueriedStripe{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[69]
+		mi := &file_volume_server_proto_msgTypes[73]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3904,7 +4083,7 @@ func (x *QueriedStripe) String() string {
 func (*QueriedStripe) ProtoMessage() {}
 
 func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[69]
+	mi := &file_volume_server_proto_msgTypes[73]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3917,7 +4096,7 @@ func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueriedStripe.ProtoReflect.Descriptor instead.
 func (*QueriedStripe) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{69}
+	return file_volume_server_proto_rawDescGZIP(), []int{73}
 }
 
 func (x *QueriedStripe) GetRecords() []byte {
@@ -3939,7 +4118,7 @@ type VolumeNeedleStatusRequest struct {
 func (x *VolumeNeedleStatusRequest) Reset() {
 	*x = VolumeNeedleStatusRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[70]
+		mi := &file_volume_server_proto_msgTypes[74]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3952,7 +4131,7 @@ func (x *VolumeNeedleStatusRequest) String() string {
 func (*VolumeNeedleStatusRequest) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[70]
+	mi := &file_volume_server_proto_msgTypes[74]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -3965,7 +4144,7 @@ func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusRequest.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{70}
+	return file_volume_server_proto_rawDescGZIP(), []int{74}
 }
 
 func (x *VolumeNeedleStatusRequest) GetVolumeId() uint32 {
@@ -3998,7 +4177,7 @@ type VolumeNeedleStatusResponse struct {
 func (x *VolumeNeedleStatusResponse) Reset() {
 	*x = VolumeNeedleStatusResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[71]
+		mi := &file_volume_server_proto_msgTypes[75]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4011,7 +4190,7 @@ func (x *VolumeNeedleStatusResponse) String() string {
 func (*VolumeNeedleStatusResponse) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[71]
+	mi := &file_volume_server_proto_msgTypes[75]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4024,7 +4203,7 @@ func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusResponse.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{71}
+	return file_volume_server_proto_rawDescGZIP(), []int{75}
 }
 
 func (x *VolumeNeedleStatusResponse) GetNeedleId() uint64 {
@@ -4082,7 +4261,7 @@ type QueryRequest_Filter struct {
 func (x *QueryRequest_Filter) Reset() {
 	*x = QueryRequest_Filter{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[72]
+		mi := &file_volume_server_proto_msgTypes[76]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4095,7 +4274,7 @@ func (x *QueryRequest_Filter) String() string {
 func (*QueryRequest_Filter) ProtoMessage() {}
 
 func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[72]
+	mi := &file_volume_server_proto_msgTypes[76]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4108,7 +4287,7 @@ func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_Filter.ProtoReflect.Descriptor instead.
 func (*QueryRequest_Filter) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 0}
 }
 
 func (x *QueryRequest_Filter) GetField() string {
@@ -4147,7 +4326,7 @@ type QueryRequest_InputSerialization struct {
 func (x *QueryRequest_InputSerialization) Reset() {
 	*x = QueryRequest_InputSerialization{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[73]
+		mi := &file_volume_server_proto_msgTypes[77]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4160,7 +4339,7 @@ func (x *QueryRequest_InputSerialization) String() string {
 func (*QueryRequest_InputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[73]
+	mi := &file_volume_server_proto_msgTypes[77]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4173,7 +4352,7 @@ func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_InputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 1}
 }
 
 func (x *QueryRequest_InputSerialization) GetCompressionType() string {
@@ -4216,7 +4395,7 @@ type QueryRequest_OutputSerialization struct {
 func (x *QueryRequest_OutputSerialization) Reset() {
 	*x = QueryRequest_OutputSerialization{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[74]
+		mi := &file_volume_server_proto_msgTypes[78]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4229,7 +4408,7 @@ func (x *QueryRequest_OutputSerialization) String() string {
 func (*QueryRequest_OutputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[74]
+	mi := &file_volume_server_proto_msgTypes[78]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4242,7 +4421,7 @@ func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_OutputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 2}
 }
 
 func (x *QueryRequest_OutputSerialization) GetCsvOutput() *QueryRequest_OutputSerialization_CSVOutput {
@@ -4277,7 +4456,7 @@ type QueryRequest_InputSerialization_CSVInput struct {
 func (x *QueryRequest_InputSerialization_CSVInput) Reset() {
 	*x = QueryRequest_InputSerialization_CSVInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[75]
+		mi := &file_volume_server_proto_msgTypes[79]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4290,7 +4469,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) String() string {
 func (*QueryRequest_InputSerialization_CSVInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[75]
+	mi := &file_volume_server_proto_msgTypes[79]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4303,7 +4482,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.M
 
 // Deprecated: Use QueryRequest_InputSerialization_CSVInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_CSVInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 1, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 1, 0}
 }
 
 func (x *QueryRequest_InputSerialization_CSVInput) GetFileHeaderInfo() string {
@@ -4366,7 +4545,7 @@ type QueryRequest_InputSerialization_JSONInput struct {
 func (x *QueryRequest_InputSerialization_JSONInput) Reset() {
 	*x = QueryRequest_InputSerialization_JSONInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[76]
+		mi := &file_volume_server_proto_msgTypes[80]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4379,7 +4558,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) String() string {
 func (*QueryRequest_InputSerialization_JSONInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[76]
+	mi := &file_volume_server_proto_msgTypes[80]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4392,7 +4571,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.
 
 // Deprecated: Use QueryRequest_InputSerialization_JSONInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_JSONInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 1, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 1, 1}
 }
 
 func (x *QueryRequest_InputSerialization_JSONInput) GetType() string {
@@ -4411,7 +4590,7 @@ type QueryRequest_InputSerialization_ParquetInput struct {
 func (x *QueryRequest_InputSerialization_ParquetInput) Reset() {
 	*x = QueryRequest_InputSerialization_ParquetInput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[77]
+		mi := &file_volume_server_proto_msgTypes[81]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4424,7 +4603,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) String() string {
 func (*QueryRequest_InputSerialization_ParquetInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[77]
+	mi := &file_volume_server_proto_msgTypes[81]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4437,7 +4616,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protorefle
 
 // Deprecated: Use QueryRequest_InputSerialization_ParquetInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_ParquetInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 1, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 1, 2}
 }
 
 type QueryRequest_OutputSerialization_CSVOutput struct {
@@ -4455,7 +4634,7 @@ type QueryRequest_OutputSerialization_CSVOutput struct {
 func (x *QueryRequest_OutputSerialization_CSVOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_CSVOutput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[78]
+		mi := &file_volume_server_proto_msgTypes[82]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4468,7 +4647,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) String() string {
 func (*QueryRequest_OutputSerialization_CSVOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[78]
+	mi := &file_volume_server_proto_msgTypes[82]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4481,7 +4660,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect
 
 // Deprecated: Use QueryRequest_OutputSerialization_CSVOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_CSVOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 2, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 2, 0}
 }
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) GetQuoteFields() string {
@@ -4530,7 +4709,7 @@ type QueryRequest_OutputSerialization_JSONOutput struct {
 func (x *QueryRequest_OutputSerialization_JSONOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_JSONOutput{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_volume_server_proto_msgTypes[79]
+		mi := &file_volume_server_proto_msgTypes[83]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -4543,7 +4722,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) String() string {
 func (*QueryRequest_OutputSerialization_JSONOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[79]
+	mi := &file_volume_server_proto_msgTypes[83]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4556,7 +4735,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflec
 
 // Deprecated: Use QueryRequest_OutputSerialization_JSONOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_JSONOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{68, 2, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{72, 2, 1}
 }
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) GetRecordDelimiter() string {
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 }
 
 var (
@@ -5355,7 +5560,7 @@ func file_volume_server_proto_rawDescGZIP() []byte {
 	return file_volume_server_proto_rawDescData
 }
 
-var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 80)
+var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 84)
 var file_volume_server_proto_goTypes = []interface{}{
 	(*BatchDeleteRequest)(nil),                           // 0: volume_server_pb.BatchDeleteRequest
 	(*BatchDeleteResponse)(nil),                          // 1: volume_server_pb.BatchDeleteResponse
@@ -5385,72 +5590,76 @@ var file_volume_server_proto_goTypes = []interface{}{
 	(*VolumeDeleteResponse)(nil),                         // 25: volume_server_pb.VolumeDeleteResponse
 	(*VolumeMarkReadonlyRequest)(nil),                    // 26: volume_server_pb.VolumeMarkReadonlyRequest
 	(*VolumeMarkReadonlyResponse)(nil),                   // 27: volume_server_pb.VolumeMarkReadonlyResponse
-	(*VolumeConfigureRequest)(nil),                       // 28: volume_server_pb.VolumeConfigureRequest
-	(*VolumeConfigureResponse)(nil),                      // 29: volume_server_pb.VolumeConfigureResponse
-	(*VolumeCopyRequest)(nil),                            // 30: volume_server_pb.VolumeCopyRequest
-	(*VolumeCopyResponse)(nil),                           // 31: volume_server_pb.VolumeCopyResponse
-	(*CopyFileRequest)(nil),                              // 32: volume_server_pb.CopyFileRequest
-	(*CopyFileResponse)(nil),                             // 33: volume_server_pb.CopyFileResponse
-	(*VolumeTailSenderRequest)(nil),                      // 34: volume_server_pb.VolumeTailSenderRequest
-	(*VolumeTailSenderResponse)(nil),                     // 35: volume_server_pb.VolumeTailSenderResponse
-	(*VolumeTailReceiverRequest)(nil),                    // 36: volume_server_pb.VolumeTailReceiverRequest
-	(*VolumeTailReceiverResponse)(nil),                   // 37: volume_server_pb.VolumeTailReceiverResponse
-	(*VolumeEcShardsGenerateRequest)(nil),                // 38: volume_server_pb.VolumeEcShardsGenerateRequest
-	(*VolumeEcShardsGenerateResponse)(nil),               // 39: volume_server_pb.VolumeEcShardsGenerateResponse
-	(*VolumeEcShardsRebuildRequest)(nil),                 // 40: volume_server_pb.VolumeEcShardsRebuildRequest
-	(*VolumeEcShardsRebuildResponse)(nil),                // 41: volume_server_pb.VolumeEcShardsRebuildResponse
-	(*VolumeEcShardsCopyRequest)(nil),                    // 42: volume_server_pb.VolumeEcShardsCopyRequest
-	(*VolumeEcShardsCopyResponse)(nil),                   // 43: volume_server_pb.VolumeEcShardsCopyResponse
-	(*VolumeEcShardsDeleteRequest)(nil),                  // 44: volume_server_pb.VolumeEcShardsDeleteRequest
-	(*VolumeEcShardsDeleteResponse)(nil),                 // 45: volume_server_pb.VolumeEcShardsDeleteResponse
-	(*VolumeEcShardsMountRequest)(nil),                   // 46: volume_server_pb.VolumeEcShardsMountRequest
-	(*VolumeEcShardsMountResponse)(nil),                  // 47: volume_server_pb.VolumeEcShardsMountResponse
-	(*VolumeEcShardsUnmountRequest)(nil),                 // 48: volume_server_pb.VolumeEcShardsUnmountRequest
-	(*VolumeEcShardsUnmountResponse)(nil),                // 49: volume_server_pb.VolumeEcShardsUnmountResponse
-	(*VolumeEcShardReadRequest)(nil),                     // 50: volume_server_pb.VolumeEcShardReadRequest
-	(*VolumeEcShardReadResponse)(nil),                    // 51: volume_server_pb.VolumeEcShardReadResponse
-	(*VolumeEcBlobDeleteRequest)(nil),                    // 52: volume_server_pb.VolumeEcBlobDeleteRequest
-	(*VolumeEcBlobDeleteResponse)(nil),                   // 53: volume_server_pb.VolumeEcBlobDeleteResponse
-	(*VolumeEcShardsToVolumeRequest)(nil),                // 54: volume_server_pb.VolumeEcShardsToVolumeRequest
-	(*VolumeEcShardsToVolumeResponse)(nil),               // 55: volume_server_pb.VolumeEcShardsToVolumeResponse
-	(*ReadVolumeFileStatusRequest)(nil),                  // 56: volume_server_pb.ReadVolumeFileStatusRequest
-	(*ReadVolumeFileStatusResponse)(nil),                 // 57: volume_server_pb.ReadVolumeFileStatusResponse
-	(*DiskStatus)(nil),                                   // 58: volume_server_pb.DiskStatus
-	(*MemStatus)(nil),                                    // 59: volume_server_pb.MemStatus
-	(*RemoteFile)(nil),                                   // 60: volume_server_pb.RemoteFile
-	(*VolumeInfo)(nil),                                   // 61: volume_server_pb.VolumeInfo
-	(*VolumeTierMoveDatToRemoteRequest)(nil),             // 62: volume_server_pb.VolumeTierMoveDatToRemoteRequest
-	(*VolumeTierMoveDatToRemoteResponse)(nil),            // 63: volume_server_pb.VolumeTierMoveDatToRemoteResponse
-	(*VolumeTierMoveDatFromRemoteRequest)(nil),           // 64: volume_server_pb.VolumeTierMoveDatFromRemoteRequest
-	(*VolumeTierMoveDatFromRemoteResponse)(nil),          // 65: volume_server_pb.VolumeTierMoveDatFromRemoteResponse
-	(*VolumeServerStatusRequest)(nil),                    // 66: volume_server_pb.VolumeServerStatusRequest
-	(*VolumeServerStatusResponse)(nil),                   // 67: volume_server_pb.VolumeServerStatusResponse
-	(*QueryRequest)(nil),                                 // 68: volume_server_pb.QueryRequest
-	(*QueriedStripe)(nil),                                // 69: volume_server_pb.QueriedStripe
-	(*VolumeNeedleStatusRequest)(nil),                    // 70: volume_server_pb.VolumeNeedleStatusRequest
-	(*VolumeNeedleStatusResponse)(nil),                   // 71: volume_server_pb.VolumeNeedleStatusResponse
-	(*QueryRequest_Filter)(nil),                          // 72: volume_server_pb.QueryRequest.Filter
-	(*QueryRequest_InputSerialization)(nil),              // 73: volume_server_pb.QueryRequest.InputSerialization
-	(*QueryRequest_OutputSerialization)(nil),             // 74: volume_server_pb.QueryRequest.OutputSerialization
-	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 75: volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 76: volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 77: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 78: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 79: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	(*VolumeMarkWritableRequest)(nil),                    // 28: volume_server_pb.VolumeMarkWritableRequest
+	(*VolumeMarkWritableResponse)(nil),                   // 29: volume_server_pb.VolumeMarkWritableResponse
+	(*VolumeConfigureRequest)(nil),                       // 30: volume_server_pb.VolumeConfigureRequest
+	(*VolumeConfigureResponse)(nil),                      // 31: volume_server_pb.VolumeConfigureResponse
+	(*VolumeStatusRequest)(nil),                          // 32: volume_server_pb.VolumeStatusRequest
+	(*VolumeStatusResponse)(nil),                         // 33: volume_server_pb.VolumeStatusResponse
+	(*VolumeCopyRequest)(nil),                            // 34: volume_server_pb.VolumeCopyRequest
+	(*VolumeCopyResponse)(nil),                           // 35: volume_server_pb.VolumeCopyResponse
+	(*CopyFileRequest)(nil),                              // 36: volume_server_pb.CopyFileRequest
+	(*CopyFileResponse)(nil),                             // 37: volume_server_pb.CopyFileResponse
+	(*VolumeTailSenderRequest)(nil),                      // 38: volume_server_pb.VolumeTailSenderRequest
+	(*VolumeTailSenderResponse)(nil),                     // 39: volume_server_pb.VolumeTailSenderResponse
+	(*VolumeTailReceiverRequest)(nil),                    // 40: volume_server_pb.VolumeTailReceiverRequest
+	(*VolumeTailReceiverResponse)(nil),                   // 41: volume_server_pb.VolumeTailReceiverResponse
+	(*VolumeEcShardsGenerateRequest)(nil),                // 42: volume_server_pb.VolumeEcShardsGenerateRequest
+	(*VolumeEcShardsGenerateResponse)(nil),               // 43: volume_server_pb.VolumeEcShardsGenerateResponse
+	(*VolumeEcShardsRebuildRequest)(nil),                 // 44: volume_server_pb.VolumeEcShardsRebuildRequest
+	(*VolumeEcShardsRebuildResponse)(nil),                // 45: volume_server_pb.VolumeEcShardsRebuildResponse
+	(*VolumeEcShardsCopyRequest)(nil),                    // 46: volume_server_pb.VolumeEcShardsCopyRequest
+	(*VolumeEcShardsCopyResponse)(nil),                   // 47: volume_server_pb.VolumeEcShardsCopyResponse
+	(*VolumeEcShardsDeleteRequest)(nil),                  // 48: volume_server_pb.VolumeEcShardsDeleteRequest
+	(*VolumeEcShardsDeleteResponse)(nil),                 // 49: volume_server_pb.VolumeEcShardsDeleteResponse
+	(*VolumeEcShardsMountRequest)(nil),                   // 50: volume_server_pb.VolumeEcShardsMountRequest
+	(*VolumeEcShardsMountResponse)(nil),                  // 51: volume_server_pb.VolumeEcShardsMountResponse
+	(*VolumeEcShardsUnmountRequest)(nil),                 // 52: volume_server_pb.VolumeEcShardsUnmountRequest
+	(*VolumeEcShardsUnmountResponse)(nil),                // 53: volume_server_pb.VolumeEcShardsUnmountResponse
+	(*VolumeEcShardReadRequest)(nil),                     // 54: volume_server_pb.VolumeEcShardReadRequest
+	(*VolumeEcShardReadResponse)(nil),                    // 55: volume_server_pb.VolumeEcShardReadResponse
+	(*VolumeEcBlobDeleteRequest)(nil),                    // 56: volume_server_pb.VolumeEcBlobDeleteRequest
+	(*VolumeEcBlobDeleteResponse)(nil),                   // 57: volume_server_pb.VolumeEcBlobDeleteResponse
+	(*VolumeEcShardsToVolumeRequest)(nil),                // 58: volume_server_pb.VolumeEcShardsToVolumeRequest
+	(*VolumeEcShardsToVolumeResponse)(nil),               // 59: volume_server_pb.VolumeEcShardsToVolumeResponse
+	(*ReadVolumeFileStatusRequest)(nil),                  // 60: volume_server_pb.ReadVolumeFileStatusRequest
+	(*ReadVolumeFileStatusResponse)(nil),                 // 61: volume_server_pb.ReadVolumeFileStatusResponse
+	(*DiskStatus)(nil),                                   // 62: volume_server_pb.DiskStatus
+	(*MemStatus)(nil),                                    // 63: volume_server_pb.MemStatus
+	(*RemoteFile)(nil),                                   // 64: volume_server_pb.RemoteFile
+	(*VolumeInfo)(nil),                                   // 65: volume_server_pb.VolumeInfo
+	(*VolumeTierMoveDatToRemoteRequest)(nil),             // 66: volume_server_pb.VolumeTierMoveDatToRemoteRequest
+	(*VolumeTierMoveDatToRemoteResponse)(nil),            // 67: volume_server_pb.VolumeTierMoveDatToRemoteResponse
+	(*VolumeTierMoveDatFromRemoteRequest)(nil),           // 68: volume_server_pb.VolumeTierMoveDatFromRemoteRequest
+	(*VolumeTierMoveDatFromRemoteResponse)(nil),          // 69: volume_server_pb.VolumeTierMoveDatFromRemoteResponse
+	(*VolumeServerStatusRequest)(nil),                    // 70: volume_server_pb.VolumeServerStatusRequest
+	(*VolumeServerStatusResponse)(nil),                   // 71: volume_server_pb.VolumeServerStatusResponse
+	(*QueryRequest)(nil),                                 // 72: volume_server_pb.QueryRequest
+	(*QueriedStripe)(nil),                                // 73: volume_server_pb.QueriedStripe
+	(*VolumeNeedleStatusRequest)(nil),                    // 74: volume_server_pb.VolumeNeedleStatusRequest
+	(*VolumeNeedleStatusResponse)(nil),                   // 75: volume_server_pb.VolumeNeedleStatusResponse
+	(*QueryRequest_Filter)(nil),                          // 76: volume_server_pb.QueryRequest.Filter
+	(*QueryRequest_InputSerialization)(nil),              // 77: volume_server_pb.QueryRequest.InputSerialization
+	(*QueryRequest_OutputSerialization)(nil),             // 78: volume_server_pb.QueryRequest.OutputSerialization
+	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 79: volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 80: volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 81: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 82: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 83: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
 }
 var file_volume_server_proto_depIdxs = []int32{
 	2,  // 0: volume_server_pb.BatchDeleteResponse.results:type_name -> volume_server_pb.DeleteResult
-	60, // 1: volume_server_pb.VolumeInfo.files:type_name -> volume_server_pb.RemoteFile
-	58, // 2: volume_server_pb.VolumeServerStatusResponse.disk_statuses:type_name -> volume_server_pb.DiskStatus
-	59, // 3: volume_server_pb.VolumeServerStatusResponse.memory_status:type_name -> volume_server_pb.MemStatus
-	72, // 4: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
-	73, // 5: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
-	74, // 6: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
-	75, // 7: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	76, // 8: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	77, // 9: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	78, // 10: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	79, // 11: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	64, // 1: volume_server_pb.VolumeInfo.files:type_name -> volume_server_pb.RemoteFile
+	62, // 2: volume_server_pb.VolumeServerStatusResponse.disk_statuses:type_name -> volume_server_pb.DiskStatus
+	63, // 3: volume_server_pb.VolumeServerStatusResponse.memory_status:type_name -> volume_server_pb.MemStatus
+	76, // 4: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
+	77, // 5: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
+	78, // 6: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
+	79, // 7: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	80, // 8: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	81, // 9: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	82, // 10: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	83, // 11: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
 	0,  // 12: volume_server_pb.VolumeServer.BatchDelete:input_type -> volume_server_pb.BatchDeleteRequest
 	4,  // 13: volume_server_pb.VolumeServer.VacuumVolumeCheck:input_type -> volume_server_pb.VacuumVolumeCheckRequest
 	6,  // 14: volume_server_pb.VolumeServer.VacuumVolumeCompact:input_type -> volume_server_pb.VacuumVolumeCompactRequest
@@ -5464,61 +5673,65 @@ var file_volume_server_proto_depIdxs = []int32{
 	22, // 22: volume_server_pb.VolumeServer.VolumeUnmount:input_type -> volume_server_pb.VolumeUnmountRequest
 	24, // 23: volume_server_pb.VolumeServer.VolumeDelete:input_type -> volume_server_pb.VolumeDeleteRequest
 	26, // 24: volume_server_pb.VolumeServer.VolumeMarkReadonly:input_type -> volume_server_pb.VolumeMarkReadonlyRequest
-	28, // 25: volume_server_pb.VolumeServer.VolumeConfigure:input_type -> volume_server_pb.VolumeConfigureRequest
-	30, // 26: volume_server_pb.VolumeServer.VolumeCopy:input_type -> volume_server_pb.VolumeCopyRequest
-	56, // 27: volume_server_pb.VolumeServer.ReadVolumeFileStatus:input_type -> volume_server_pb.ReadVolumeFileStatusRequest
-	32, // 28: volume_server_pb.VolumeServer.CopyFile:input_type -> volume_server_pb.CopyFileRequest
-	34, // 29: volume_server_pb.VolumeServer.VolumeTailSender:input_type -> volume_server_pb.VolumeTailSenderRequest
-	36, // 30: volume_server_pb.VolumeServer.VolumeTailReceiver:input_type -> volume_server_pb.VolumeTailReceiverRequest
-	38, // 31: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:input_type -> volume_server_pb.VolumeEcShardsGenerateRequest
-	40, // 32: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:input_type -> volume_server_pb.VolumeEcShardsRebuildRequest
-	42, // 33: volume_server_pb.VolumeServer.VolumeEcShardsCopy:input_type -> volume_server_pb.VolumeEcShardsCopyRequest
-	44, // 34: volume_server_pb.VolumeServer.VolumeEcShardsDelete:input_type -> volume_server_pb.VolumeEcShardsDeleteRequest
-	46, // 35: volume_server_pb.VolumeServer.VolumeEcShardsMount:input_type -> volume_server_pb.VolumeEcShardsMountRequest
-	48, // 36: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:input_type -> volume_server_pb.VolumeEcShardsUnmountRequest
-	50, // 37: volume_server_pb.VolumeServer.VolumeEcShardRead:input_type -> volume_server_pb.VolumeEcShardReadRequest
-	52, // 38: volume_server_pb.VolumeServer.VolumeEcBlobDelete:input_type -> volume_server_pb.VolumeEcBlobDeleteRequest
-	54, // 39: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:input_type -> volume_server_pb.VolumeEcShardsToVolumeRequest
-	62, // 40: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:input_type -> volume_server_pb.VolumeTierMoveDatToRemoteRequest
-	64, // 41: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:input_type -> volume_server_pb.VolumeTierMoveDatFromRemoteRequest
-	66, // 42: volume_server_pb.VolumeServer.VolumeServerStatus:input_type -> volume_server_pb.VolumeServerStatusRequest
-	68, // 43: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
-	70, // 44: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
-	1,  // 45: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
-	5,  // 46: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
-	7,  // 47: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
-	9,  // 48: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
-	11, // 49: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
-	13, // 50: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
-	15, // 51: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
-	17, // 52: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
-	19, // 53: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
-	21, // 54: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
-	23, // 55: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
-	25, // 56: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
-	27, // 57: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
-	29, // 58: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
-	31, // 59: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
-	57, // 60: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
-	33, // 61: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
-	35, // 62: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
-	37, // 63: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
-	39, // 64: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
-	41, // 65: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
-	43, // 66: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
-	45, // 67: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
-	47, // 68: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
-	49, // 69: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
-	51, // 70: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
-	53, // 71: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
-	55, // 72: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
-	63, // 73: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
-	65, // 74: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
-	67, // 75: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
-	69, // 76: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
-	71, // 77: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
-	45, // [45:78] is the sub-list for method output_type
-	12, // [12:45] is the sub-list for method input_type
+	28, // 25: volume_server_pb.VolumeServer.VolumeMarkWritable:input_type -> volume_server_pb.VolumeMarkWritableRequest
+	30, // 26: volume_server_pb.VolumeServer.VolumeConfigure:input_type -> volume_server_pb.VolumeConfigureRequest
+	32, // 27: volume_server_pb.VolumeServer.VolumeStatus:input_type -> volume_server_pb.VolumeStatusRequest
+	34, // 28: volume_server_pb.VolumeServer.VolumeCopy:input_type -> volume_server_pb.VolumeCopyRequest
+	60, // 29: volume_server_pb.VolumeServer.ReadVolumeFileStatus:input_type -> volume_server_pb.ReadVolumeFileStatusRequest
+	36, // 30: volume_server_pb.VolumeServer.CopyFile:input_type -> volume_server_pb.CopyFileRequest
+	38, // 31: volume_server_pb.VolumeServer.VolumeTailSender:input_type -> volume_server_pb.VolumeTailSenderRequest
+	40, // 32: volume_server_pb.VolumeServer.VolumeTailReceiver:input_type -> volume_server_pb.VolumeTailReceiverRequest
+	42, // 33: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:input_type -> volume_server_pb.VolumeEcShardsGenerateRequest
+	44, // 34: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:input_type -> volume_server_pb.VolumeEcShardsRebuildRequest
+	46, // 35: volume_server_pb.VolumeServer.VolumeEcShardsCopy:input_type -> volume_server_pb.VolumeEcShardsCopyRequest
+	48, // 36: volume_server_pb.VolumeServer.VolumeEcShardsDelete:input_type -> volume_server_pb.VolumeEcShardsDeleteRequest
+	50, // 37: volume_server_pb.VolumeServer.VolumeEcShardsMount:input_type -> volume_server_pb.VolumeEcShardsMountRequest
+	52, // 38: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:input_type -> volume_server_pb.VolumeEcShardsUnmountRequest
+	54, // 39: volume_server_pb.VolumeServer.VolumeEcShardRead:input_type -> volume_server_pb.VolumeEcShardReadRequest
+	56, // 40: volume_server_pb.VolumeServer.VolumeEcBlobDelete:input_type -> volume_server_pb.VolumeEcBlobDeleteRequest
+	58, // 41: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:input_type -> volume_server_pb.VolumeEcShardsToVolumeRequest
+	66, // 42: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:input_type -> volume_server_pb.VolumeTierMoveDatToRemoteRequest
+	68, // 43: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:input_type -> volume_server_pb.VolumeTierMoveDatFromRemoteRequest
+	70, // 44: volume_server_pb.VolumeServer.VolumeServerStatus:input_type -> volume_server_pb.VolumeServerStatusRequest
+	72, // 45: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
+	74, // 46: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
+	1,  // 47: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
+	5,  // 48: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
+	7,  // 49: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
+	9,  // 50: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
+	11, // 51: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
+	13, // 52: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
+	15, // 53: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
+	17, // 54: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
+	19, // 55: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
+	21, // 56: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
+	23, // 57: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
+	25, // 58: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
+	27, // 59: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
+	29, // 60: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
+	31, // 61: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
+	33, // 62: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
+	35, // 63: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
+	61, // 64: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
+	37, // 65: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
+	39, // 66: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
+	41, // 67: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
+	43, // 68: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
+	45, // 69: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
+	47, // 70: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
+	49, // 71: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
+	51, // 72: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
+	53, // 73: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
+	55, // 74: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
+	57, // 75: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
+	59, // 76: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
+	67, // 77: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
+	69, // 78: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
+	71, // 79: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
+	73, // 80: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
+	75, // 81: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
+	47, // [47:82] is the sub-list for method output_type
+	12, // [12:47] is the sub-list for method input_type
 	12, // [12:12] is the sub-list for extension type_name
 	12, // [12:12] is the sub-list for extension extendee
 	0,  // [0:12] is the sub-list for field type_name
@@ -5867,7 +6080,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[28].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeConfigureRequest); i {
+			switch v := v.(*VolumeMarkWritableRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5879,7 +6092,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[29].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeConfigureResponse); i {
+			switch v := v.(*VolumeMarkWritableResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5891,7 +6104,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[30].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeCopyRequest); i {
+			switch v := v.(*VolumeConfigureRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5903,7 +6116,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[31].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeCopyResponse); i {
+			switch v := v.(*VolumeConfigureResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5915,7 +6128,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[32].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CopyFileRequest); i {
+			switch v := v.(*VolumeStatusRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5927,7 +6140,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[33].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CopyFileResponse); i {
+			switch v := v.(*VolumeStatusResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5939,7 +6152,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[34].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTailSenderRequest); i {
+			switch v := v.(*VolumeCopyRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5951,7 +6164,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[35].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTailSenderResponse); i {
+			switch v := v.(*VolumeCopyResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5963,7 +6176,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[36].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTailReceiverRequest); i {
+			switch v := v.(*CopyFileRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5975,7 +6188,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[37].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTailReceiverResponse); i {
+			switch v := v.(*CopyFileResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5987,7 +6200,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[38].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsGenerateRequest); i {
+			switch v := v.(*VolumeTailSenderRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -5999,7 +6212,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[39].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsGenerateResponse); i {
+			switch v := v.(*VolumeTailSenderResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6011,7 +6224,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[40].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsRebuildRequest); i {
+			switch v := v.(*VolumeTailReceiverRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6023,7 +6236,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[41].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsRebuildResponse); i {
+			switch v := v.(*VolumeTailReceiverResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6035,7 +6248,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[42].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsCopyRequest); i {
+			switch v := v.(*VolumeEcShardsGenerateRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6047,7 +6260,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[43].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsCopyResponse); i {
+			switch v := v.(*VolumeEcShardsGenerateResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6059,7 +6272,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[44].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsDeleteRequest); i {
+			switch v := v.(*VolumeEcShardsRebuildRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6071,7 +6284,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[45].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsDeleteResponse); i {
+			switch v := v.(*VolumeEcShardsRebuildResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6083,7 +6296,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[46].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsMountRequest); i {
+			switch v := v.(*VolumeEcShardsCopyRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6095,7 +6308,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[47].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsMountResponse); i {
+			switch v := v.(*VolumeEcShardsCopyResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6107,7 +6320,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[48].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsUnmountRequest); i {
+			switch v := v.(*VolumeEcShardsDeleteRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6119,7 +6332,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[49].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsUnmountResponse); i {
+			switch v := v.(*VolumeEcShardsDeleteResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6131,7 +6344,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[50].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardReadRequest); i {
+			switch v := v.(*VolumeEcShardsMountRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6143,7 +6356,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[51].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardReadResponse); i {
+			switch v := v.(*VolumeEcShardsMountResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6155,7 +6368,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[52].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcBlobDeleteRequest); i {
+			switch v := v.(*VolumeEcShardsUnmountRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6167,7 +6380,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[53].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcBlobDeleteResponse); i {
+			switch v := v.(*VolumeEcShardsUnmountResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6179,7 +6392,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[54].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsToVolumeRequest); i {
+			switch v := v.(*VolumeEcShardReadRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6191,7 +6404,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[55].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeEcShardsToVolumeResponse); i {
+			switch v := v.(*VolumeEcShardReadResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6203,7 +6416,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[56].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ReadVolumeFileStatusRequest); i {
+			switch v := v.(*VolumeEcBlobDeleteRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6215,7 +6428,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[57].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ReadVolumeFileStatusResponse); i {
+			switch v := v.(*VolumeEcBlobDeleteResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6227,7 +6440,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[58].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DiskStatus); i {
+			switch v := v.(*VolumeEcShardsToVolumeRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6239,7 +6452,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[59].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MemStatus); i {
+			switch v := v.(*VolumeEcShardsToVolumeResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6251,7 +6464,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[60].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*RemoteFile); i {
+			switch v := v.(*ReadVolumeFileStatusRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6263,7 +6476,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[61].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeInfo); i {
+			switch v := v.(*ReadVolumeFileStatusResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6275,7 +6488,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[62].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTierMoveDatToRemoteRequest); i {
+			switch v := v.(*DiskStatus); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6287,7 +6500,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[63].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTierMoveDatToRemoteResponse); i {
+			switch v := v.(*MemStatus); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6299,7 +6512,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[64].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTierMoveDatFromRemoteRequest); i {
+			switch v := v.(*RemoteFile); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6311,7 +6524,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[65].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeTierMoveDatFromRemoteResponse); i {
+			switch v := v.(*VolumeInfo); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6323,7 +6536,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[66].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeServerStatusRequest); i {
+			switch v := v.(*VolumeTierMoveDatToRemoteRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6335,7 +6548,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[67].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeServerStatusResponse); i {
+			switch v := v.(*VolumeTierMoveDatToRemoteResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6347,7 +6560,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[68].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest); i {
+			switch v := v.(*VolumeTierMoveDatFromRemoteRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6359,7 +6572,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[69].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueriedStripe); i {
+			switch v := v.(*VolumeTierMoveDatFromRemoteResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6371,7 +6584,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[70].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeNeedleStatusRequest); i {
+			switch v := v.(*VolumeServerStatusRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6383,7 +6596,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[71].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*VolumeNeedleStatusResponse); i {
+			switch v := v.(*VolumeServerStatusResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6395,7 +6608,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[72].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_Filter); i {
+			switch v := v.(*QueryRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6407,7 +6620,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[73].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization); i {
+			switch v := v.(*QueriedStripe); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6419,7 +6632,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[74].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_OutputSerialization); i {
+			switch v := v.(*VolumeNeedleStatusRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6431,7 +6644,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[75].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_CSVInput); i {
+			switch v := v.(*VolumeNeedleStatusResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6443,7 +6656,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[76].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_JSONInput); i {
+			switch v := v.(*QueryRequest_Filter); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6455,7 +6668,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[77].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_InputSerialization_ParquetInput); i {
+			switch v := v.(*QueryRequest_InputSerialization); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6467,7 +6680,7 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[78].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QueryRequest_OutputSerialization_CSVOutput); i {
+			switch v := v.(*QueryRequest_OutputSerialization); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -6479,6 +6692,54 @@ func file_volume_server_proto_init() {
 			}
 		}
 		file_volume_server_proto_msgTypes[79].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_InputSerialization_CSVInput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[80].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_InputSerialization_JSONInput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[81].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_InputSerialization_ParquetInput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[82].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QueryRequest_OutputSerialization_CSVOutput); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_volume_server_proto_msgTypes[83].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*QueryRequest_OutputSerialization_JSONOutput); i {
 			case 0:
 				return &v.state
@@ -6497,7 +6758,7 @@ func file_volume_server_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_volume_server_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   80,
+			NumMessages:   84,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
@@ -6537,7 +6798,9 @@ type VolumeServerClient interface {
 	VolumeUnmount(ctx context.Context, in *VolumeUnmountRequest, opts ...grpc.CallOption) (*VolumeUnmountResponse, error)
 	VolumeDelete(ctx context.Context, in *VolumeDeleteRequest, opts ...grpc.CallOption) (*VolumeDeleteResponse, error)
 	VolumeMarkReadonly(ctx context.Context, in *VolumeMarkReadonlyRequest, opts ...grpc.CallOption) (*VolumeMarkReadonlyResponse, error)
+	VolumeMarkWritable(ctx context.Context, in *VolumeMarkWritableRequest, opts ...grpc.CallOption) (*VolumeMarkWritableResponse, error)
 	VolumeConfigure(ctx context.Context, in *VolumeConfigureRequest, opts ...grpc.CallOption) (*VolumeConfigureResponse, error)
+	VolumeStatus(ctx context.Context, in *VolumeStatusRequest, opts ...grpc.CallOption) (*VolumeStatusResponse, error)
 	// copy the .idx .dat files, and mount this volume
 	VolumeCopy(ctx context.Context, in *VolumeCopyRequest, opts ...grpc.CallOption) (*VolumeCopyResponse, error)
 	ReadVolumeFileStatus(ctx context.Context, in *ReadVolumeFileStatusRequest, opts ...grpc.CallOption) (*ReadVolumeFileStatusResponse, error)
@@ -6711,6 +6974,15 @@ func (c *volumeServerClient) VolumeMarkReadonly(ctx context.Context, in *VolumeM
 	return out, nil
 }
 
+func (c *volumeServerClient) VolumeMarkWritable(ctx context.Context, in *VolumeMarkWritableRequest, opts ...grpc.CallOption) (*VolumeMarkWritableResponse, error) {
+	out := new(VolumeMarkWritableResponse)
+	err := c.cc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeMarkWritable", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *volumeServerClient) VolumeConfigure(ctx context.Context, in *VolumeConfigureRequest, opts ...grpc.CallOption) (*VolumeConfigureResponse, error) {
 	out := new(VolumeConfigureResponse)
 	err := c.cc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeConfigure", in, out, opts...)
@@ -6720,6 +6992,15 @@ func (c *volumeServerClient) VolumeConfigure(ctx context.Context, in *VolumeConf
 	return out, nil
 }
 
+func (c *volumeServerClient) VolumeStatus(ctx context.Context, in *VolumeStatusRequest, opts ...grpc.CallOption) (*VolumeStatusResponse, error) {
+	out := new(VolumeStatusResponse)
+	err := c.cc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeStatus", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *volumeServerClient) VolumeCopy(ctx context.Context, in *VolumeCopyRequest, opts ...grpc.CallOption) (*VolumeCopyResponse, error) {
 	out := new(VolumeCopyResponse)
 	err := c.cc.Invoke(ctx, "/volume_server_pb.VolumeServer/VolumeCopy", in, out, opts...)
@@ -7045,7 +7326,9 @@ type VolumeServerServer interface {
 	VolumeUnmount(context.Context, *VolumeUnmountRequest) (*VolumeUnmountResponse, error)
 	VolumeDelete(context.Context, *VolumeDeleteRequest) (*VolumeDeleteResponse, error)
 	VolumeMarkReadonly(context.Context, *VolumeMarkReadonlyRequest) (*VolumeMarkReadonlyResponse, error)
+	VolumeMarkWritable(context.Context, *VolumeMarkWritableRequest) (*VolumeMarkWritableResponse, error)
 	VolumeConfigure(context.Context, *VolumeConfigureRequest) (*VolumeConfigureResponse, error)
+	VolumeStatus(context.Context, *VolumeStatusRequest) (*VolumeStatusResponse, error)
 	// copy the .idx .dat files, and mount this volume
 	VolumeCopy(context.Context, *VolumeCopyRequest) (*VolumeCopyResponse, error)
 	ReadVolumeFileStatus(context.Context, *ReadVolumeFileStatusRequest) (*ReadVolumeFileStatusResponse, error)
@@ -7114,9 +7397,15 @@ func (*UnimplementedVolumeServerServer) VolumeDelete(context.Context, *VolumeDel
 func (*UnimplementedVolumeServerServer) VolumeMarkReadonly(context.Context, *VolumeMarkReadonlyRequest) (*VolumeMarkReadonlyResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method VolumeMarkReadonly not implemented")
 }
+func (*UnimplementedVolumeServerServer) VolumeMarkWritable(context.Context, *VolumeMarkWritableRequest) (*VolumeMarkWritableResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method VolumeMarkWritable not implemented")
+}
 func (*UnimplementedVolumeServerServer) VolumeConfigure(context.Context, *VolumeConfigureRequest) (*VolumeConfigureResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method VolumeConfigure not implemented")
 }
+func (*UnimplementedVolumeServerServer) VolumeStatus(context.Context, *VolumeStatusRequest) (*VolumeStatusResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method VolumeStatus not implemented")
+}
 func (*UnimplementedVolumeServerServer) VolumeCopy(context.Context, *VolumeCopyRequest) (*VolumeCopyResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method VolumeCopy not implemented")
 }
@@ -7416,6 +7705,24 @@ func _VolumeServer_VolumeMarkReadonly_Handler(srv interface{}, ctx context.Conte
 	return interceptor(ctx, in, info, handler)
 }
 
+func _VolumeServer_VolumeMarkWritable_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(VolumeMarkWritableRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(VolumeServerServer).VolumeMarkWritable(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/volume_server_pb.VolumeServer/VolumeMarkWritable",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(VolumeServerServer).VolumeMarkWritable(ctx, req.(*VolumeMarkWritableRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _VolumeServer_VolumeConfigure_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(VolumeConfigureRequest)
 	if err := dec(in); err != nil {
@@ -7434,6 +7741,24 @@ func _VolumeServer_VolumeConfigure_Handler(srv interface{}, ctx context.Context,
 	return interceptor(ctx, in, info, handler)
 }
 
+func _VolumeServer_VolumeStatus_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(VolumeStatusRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(VolumeServerServer).VolumeStatus(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/volume_server_pb.VolumeServer/VolumeStatus",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(VolumeServerServer).VolumeStatus(ctx, req.(*VolumeStatusRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _VolumeServer_VolumeCopy_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(VolumeCopyRequest)
 	if err := dec(in); err != nil {
@@ -7847,10 +8172,18 @@ var _VolumeServer_serviceDesc = grpc.ServiceDesc{
 			Handler:    _VolumeServer_VolumeMarkReadonly_Handler,
 		},
 		{
+			MethodName: "VolumeMarkWritable",
+			Handler:    _VolumeServer_VolumeMarkWritable_Handler,
+		},
+		{
 			MethodName: "VolumeConfigure",
 			Handler:    _VolumeServer_VolumeConfigure_Handler,
 		},
 		{
+			MethodName: "VolumeStatus",
+			Handler:    _VolumeServer_VolumeStatus_Handler,
+		},
+		{
 			MethodName: "VolumeCopy",
 			Handler:    _VolumeServer_VolumeCopy_Handler,
 		},
diff --git a/weed/replication/sink/azuresink/azure_sink.go b/weed/replication/sink/azuresink/azure_sink.go
index fa229de22..6419509be 100644
--- a/weed/replication/sink/azuresink/azure_sink.go
+++ b/weed/replication/sink/azuresink/azure_sink.go
@@ -95,7 +95,7 @@ func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		return nil
 	}
 
-	totalSize := filer2.TotalSize(entry.Chunks)
+	totalSize := filer2.FileSize(entry)
 	chunkViews := filer2.ViewFromChunks(g.filerSource.LookupFileId, entry.Chunks, 0, int64(totalSize))
 
 	// Create a URL that references a to-be-created blob in your
@@ -115,7 +115,7 @@ func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		}
 
 		var writeErr error
-		readErr := util.ReadUrlAsStream(fileUrl, nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
+		readErr := util.ReadUrlAsStream(fileUrl+"?readDeleted=true", nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
 			_, writeErr = appendBlobURL.AppendBlock(context.Background(), bytes.NewReader(data), azblob.AppendBlobAccessConditions{}, nil)
 		})
 
diff --git a/weed/replication/sink/b2sink/b2_sink.go b/weed/replication/sink/b2sink/b2_sink.go
index bf8632827..041cee952 100644
--- a/weed/replication/sink/b2sink/b2_sink.go
+++ b/weed/replication/sink/b2sink/b2_sink.go
@@ -84,7 +84,7 @@ func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		return nil
 	}
 
-	totalSize := filer2.TotalSize(entry.Chunks)
+	totalSize := filer2.FileSize(entry)
 	chunkViews := filer2.ViewFromChunks(g.filerSource.LookupFileId, entry.Chunks, 0, int64(totalSize))
 
 	bucket, err := g.client.Bucket(context.Background(), g.bucket)
@@ -103,7 +103,7 @@ func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		}
 
 		var writeErr error
-		readErr := util.ReadUrlAsStream(fileUrl, nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
+		readErr := util.ReadUrlAsStream(fileUrl+"?readDeleted=true", nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
 			_, err := writer.Write(data)
 			if err != nil {
 				writeErr = err
diff --git a/weed/replication/sink/gcssink/gcs_sink.go b/weed/replication/sink/gcssink/gcs_sink.go
index 4b58160db..82f4d72cf 100644
--- a/weed/replication/sink/gcssink/gcs_sink.go
+++ b/weed/replication/sink/gcssink/gcs_sink.go
@@ -89,7 +89,7 @@ func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		return nil
 	}
 
-	totalSize := filer2.TotalSize(entry.Chunks)
+	totalSize := filer2.FileSize(entry)
 	chunkViews := filer2.ViewFromChunks(g.filerSource.LookupFileId, entry.Chunks, 0, int64(totalSize))
 
 	wc := g.client.Bucket(g.bucket).Object(key).NewWriter(context.Background())
@@ -101,7 +101,7 @@ func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 			return err
 		}
 
-		err = util.ReadUrlAsStream(fileUrl, nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
+		err = util.ReadUrlAsStream(fileUrl+"?readDeleted=true", nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
 			wc.Write(data)
 		})
 
diff --git a/weed/replication/sink/s3sink/s3_sink.go b/weed/replication/sink/s3sink/s3_sink.go
index 625cf406c..56fc1930d 100644
--- a/weed/replication/sink/s3sink/s3_sink.go
+++ b/weed/replication/sink/s3sink/s3_sink.go
@@ -107,7 +107,7 @@ func (s3sink *S3Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 		return err
 	}
 
-	totalSize := filer2.TotalSize(entry.Chunks)
+	totalSize := filer2.FileSize(entry)
 	chunkViews := filer2.ViewFromChunks(s3sink.filerSource.LookupFileId, entry.Chunks, 0, int64(totalSize))
 
 	parts := make([]*s3.CompletedPart, len(chunkViews))
diff --git a/weed/s3api/filer_multipart.go b/weed/s3api/filer_multipart.go
index 31ac850b1..24bbafe1d 100644
--- a/weed/s3api/filer_multipart.go
+++ b/weed/s3api/filer_multipart.go
@@ -208,7 +208,7 @@ func (s3a *S3ApiServer) listObjectParts(input *s3.ListPartsInput) (output *ListP
 			output.Parts = append(output.Parts, &s3.Part{
 				PartNumber:   aws.Int64(int64(partNumber)),
 				LastModified: aws.Time(time.Unix(entry.Attributes.Mtime, 0).UTC()),
-				Size:         aws.Int64(int64(filer2.TotalSize(entry.Chunks))),
+				Size:         aws.Int64(int64(filer2.FileSize(entry))),
 				ETag:         aws.String("\"" + filer2.ETag(entry) + "\""),
 			})
 		}
diff --git a/weed/s3api/s3api_objects_list_handlers.go b/weed/s3api/s3api_objects_list_handlers.go
index 311442551..3354dd2b3 100644
--- a/weed/s3api/s3api_objects_list_handlers.go
+++ b/weed/s3api/s3api_objects_list_handlers.go
@@ -112,12 +112,12 @@ func (s3a *S3ApiServer) listFilerEntries(bucket string, originalPrefix string, m
 	if strings.HasPrefix(reqDir, "/") {
 		reqDir = reqDir[1:]
 	}
+	bucketPrefix := fmt.Sprintf("%s/%s/", s3a.option.BucketsPath, bucket)
+	reqDir = fmt.Sprintf("%s%s", bucketPrefix, reqDir)
 	if strings.HasSuffix(reqDir, "/") {
 		// remove trailing "/"
 		reqDir = reqDir[:len(reqDir)-1]
 	}
-	bucketPrefix := fmt.Sprintf("%s/%s/", s3a.option.BucketsPath, bucket)
-	reqDir = fmt.Sprintf("%s%s", bucketPrefix, reqDir)
 
 	var contents []ListEntry
 	var commonPrefixes []PrefixEntry
@@ -131,17 +131,16 @@ func (s3a *S3ApiServer) listFilerEntries(bucket string, originalPrefix string, m
 		_, isTruncated, nextMarker, doErr = s3a.doListFilerEntries(client, reqDir, prefix, maxKeys, marker, delimiter, func(dir string, entry *filer_pb.Entry) {
 			if entry.IsDirectory {
 				if delimiter == "/" {
-					prefix = fmt.Sprintf("%s%s/", dir, entry.Name)
 					commonPrefixes = append(commonPrefixes, PrefixEntry{
-						Prefix: prefix[len(bucketPrefix):],
+						Prefix: fmt.Sprintf("%s/%s/", dir, entry.Name)[len(bucketPrefix):],
 					})
 				}
 			} else {
 				contents = append(contents, ListEntry{
-					Key:          fmt.Sprintf("%s%s", dir[len(bucketPrefix):], entry.Name),
+					Key:          fmt.Sprintf("%s/%s", dir, entry.Name)[len(bucketPrefix):],
 					LastModified: time.Unix(entry.Attributes.Mtime, 0).UTC(),
 					ETag:         "\"" + filer2.ETag(entry) + "\"",
-					Size:         int64(filer2.TotalSize(entry.Chunks)),
+					Size:         int64(filer2.FileSize(entry)),
 					Owner: CanonicalUser{
 						ID:          fmt.Sprintf("%x", entry.Attributes.Uid),
 						DisplayName: entry.Attributes.UserName,
diff --git a/weed/server/filer_server_handlers_read.go b/weed/server/filer_server_handlers_read.go
index 657158c2f..449b9f1a0 100644
--- a/weed/server/filer_server_handlers_read.go
+++ b/weed/server/filer_server_handlers_read.go
@@ -105,11 +105,11 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 	adjustHeaderContentDisposition(w, r, filename)
 
 	if r.Method == "HEAD" {
-		w.Header().Set("Content-Length", strconv.FormatInt(int64(filer2.TotalSize(entry.Chunks)), 10))
+		w.Header().Set("Content-Length", strconv.FormatInt(int64(entry.Size()), 10))
 		return
 	}
 
-	totalSize := int64(filer2.TotalSize(entry.Chunks))
+	totalSize := int64(entry.Size())
 
 	if rangeReq := r.Header.Get("Range"); rangeReq == "" {
 		ext := filepath.Ext(filename)
diff --git a/weed/server/volume_grpc_admin.go b/weed/server/volume_grpc_admin.go
index eaf5aaf6e..f81ec649d 100644
--- a/weed/server/volume_grpc_admin.go
+++ b/weed/server/volume_grpc_admin.go
@@ -149,7 +149,35 @@ func (vs *VolumeServer) VolumeMarkReadonly(ctx context.Context, req *volume_serv
 	}
 
 	return resp, err
+}
+
+func (vs *VolumeServer) VolumeMarkWritable(ctx context.Context, req *volume_server_pb.VolumeMarkWritableRequest) (*volume_server_pb.VolumeMarkWritableResponse, error) {
+
+	resp := &volume_server_pb.VolumeMarkWritableResponse{}
 
+	err := vs.store.MarkVolumeWritable(needle.VolumeId(req.VolumeId))
+
+	if err != nil {
+		glog.Errorf("volume mark writable %v: %v", req, err)
+	} else {
+		glog.V(2).Infof("volume mark writable %v", req)
+	}
+
+	return resp, err
+}
+
+func (vs *VolumeServer) VolumeStatus(ctx context.Context, req *volume_server_pb.VolumeStatusRequest) (*volume_server_pb.VolumeStatusResponse, error) {
+
+	resp := &volume_server_pb.VolumeStatusResponse{}
+
+	v := vs.store.GetVolume(needle.VolumeId(req.VolumeId))
+	if v == nil {
+		return nil, fmt.Errorf("not found volume id %d", req.VolumeId)
+	}
+
+	resp.IsReadOnly = v.IsReadOnly()
+
+	return resp, nil
 }
 
 func (vs *VolumeServer) VolumeServerStatus(ctx context.Context, req *volume_server_pb.VolumeServerStatusRequest) (*volume_server_pb.VolumeServerStatusResponse, error) {
@@ -188,7 +216,7 @@ func (vs *VolumeServer) VolumeNeedleStatus(ctx context.Context, req *volume_serv
 		}
 		count, err = vs.store.ReadEcShardNeedle(volumeId, n)
 	} else {
-		count, err = vs.store.ReadVolumeNeedle(volumeId, n)
+		count, err = vs.store.ReadVolumeNeedle(volumeId, n, nil)
 	}
 	if err != nil {
 		return nil, err
@@ -199,7 +227,7 @@ func (vs *VolumeServer) VolumeNeedleStatus(ctx context.Context, req *volume_serv
 
 	resp.NeedleId = uint64(n.Id)
 	resp.Cookie = uint32(n.Cookie)
-	resp.Size = n.Size
+	resp.Size = uint32(n.Size)
 	resp.LastModified = n.LastModified
 	resp.Crc = n.Checksum.Value()
 	if n.HasTtl() {
diff --git a/weed/server/volume_grpc_batch_delete.go b/weed/server/volume_grpc_batch_delete.go
index 501964191..8e84dc2a8 100644
--- a/weed/server/volume_grpc_batch_delete.go
+++ b/weed/server/volume_grpc_batch_delete.go
@@ -41,7 +41,7 @@ func (vs *VolumeServer) BatchDelete(ctx context.Context, req *volume_server_pb.B
 		} else {
 			n.ParsePath(id_cookie)
 			cookie := n.Cookie
-			if _, err := vs.store.ReadVolumeNeedle(volumeId, n); err != nil {
+			if _, err := vs.store.ReadVolumeNeedle(volumeId, n, nil); err != nil {
 				resp.Results = append(resp.Results, &volume_server_pb.DeleteResult{
 					FileId: fid,
 					Status: http.StatusNotFound,
@@ -79,7 +79,7 @@ func (vs *VolumeServer) BatchDelete(ctx context.Context, req *volume_server_pb.B
 			resp.Results = append(resp.Results, &volume_server_pb.DeleteResult{
 				FileId: fid,
 				Status: http.StatusAccepted,
-				Size:   size},
+				Size:   uint32(size)},
 			)
 		}
 	}
diff --git a/weed/server/volume_grpc_erasure_coding.go b/weed/server/volume_grpc_erasure_coding.go
index 79348c9d7..55e0261c8 100644
--- a/weed/server/volume_grpc_erasure_coding.go
+++ b/weed/server/volume_grpc_erasure_coding.go
@@ -272,7 +272,7 @@ func (vs *VolumeServer) VolumeEcShardRead(req *volume_server_pb.VolumeEcShardRea
 
 	if req.FileKey != 0 {
 		_, size, _ := ecVolume.FindNeedleFromEcx(types.Uint64ToNeedleId(req.FileKey))
-		if size == types.TombstoneFileSize {
+		if size.IsDeleted() {
 			return stream.Send(&volume_server_pb.VolumeEcShardReadResponse{
 				IsDeleted: true,
 			})
@@ -340,7 +340,7 @@ func (vs *VolumeServer) VolumeEcBlobDelete(ctx context.Context, req *volume_serv
 			if err != nil {
 				return nil, fmt.Errorf("locate in local ec volume: %v", err)
 			}
-			if size == types.TombstoneFileSize {
+			if size.IsDeleted() {
 				return resp, nil
 			}
 
diff --git a/weed/server/volume_grpc_query.go b/weed/server/volume_grpc_query.go
index 767e28e7b..2f4fab96a 100644
--- a/weed/server/volume_grpc_query.go
+++ b/weed/server/volume_grpc_query.go
@@ -24,7 +24,7 @@ func (vs *VolumeServer) Query(req *volume_server_pb.QueryRequest, stream volume_
 		n.ParsePath(id_cookie)
 
 		cookie := n.Cookie
-		if _, err := vs.store.ReadVolumeNeedle(volumeId, n); err != nil {
+		if _, err := vs.store.ReadVolumeNeedle(volumeId, n, nil); err != nil {
 			glog.V(0).Infof("volume query failed to read fid %s: %v", fid, err)
 			return err
 		}
diff --git a/weed/server/volume_server_handlers_read.go b/weed/server/volume_server_handlers_read.go
index d730600e4..07289e880 100644
--- a/weed/server/volume_server_handlers_read.go
+++ b/weed/server/volume_server_handlers_read.go
@@ -18,6 +18,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/images"
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/stats"
+	"github.com/chrislusf/seaweedfs/weed/storage"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
@@ -81,9 +82,14 @@ func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 	cookie := n.Cookie
+
+	readOption := &storage.ReadOption{
+		ReadDeleted: r.FormValue("readDeleted") == "true",
+	}
+
 	var count int
 	if hasVolume {
-		count, err = vs.store.ReadVolumeNeedle(volumeId, n)
+		count, err = vs.store.ReadVolumeNeedle(volumeId, n, readOption)
 	} else if hasEcVolume {
 		count, err = vs.store.ReadEcShardNeedle(volumeId, n)
 	}
diff --git a/weed/server/volume_server_handlers_write.go b/weed/server/volume_server_handlers_write.go
index b4f8a90b2..78cbf08c5 100644
--- a/weed/server/volume_server_handlers_write.go
+++ b/weed/server/volume_server_handlers_write.go
@@ -104,7 +104,7 @@ func (vs *VolumeServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	_, ok := vs.store.ReadVolumeNeedle(volumeId, n)
+	_, ok := vs.store.ReadVolumeNeedle(volumeId, n, nil)
 	if ok != nil {
 		m := make(map[string]uint32)
 		m["size"] = 0
diff --git a/weed/server/webdav_server.go b/weed/server/webdav_server.go
index 8655daf70..3d2629c19 100644
--- a/weed/server/webdav_server.go
+++ b/weed/server/webdav_server.go
@@ -10,7 +10,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/util/grace"
 	"golang.org/x/net/webdav"
 	"google.golang.org/grpc"
 
@@ -70,7 +69,7 @@ type WebDavFileSystem struct {
 	secret         security.SigningKey
 	filer          *filer2.Filer
 	grpcDialOption grpc.DialOption
-	chunkCache     *chunk_cache.ChunkCache
+	chunkCache     *chunk_cache.TieredChunkCache
 }
 
 type FileInfo struct {
@@ -100,10 +99,7 @@ type WebDavFile struct {
 
 func NewWebDavFileSystem(option *WebDavOption) (webdav.FileSystem, error) {
 
-	chunkCache := chunk_cache.NewChunkCache(256, option.CacheDir, option.CacheSizeMB)
-	grace.OnInterrupt(func() {
-		chunkCache.Shutdown()
-	})
+	chunkCache := chunk_cache.NewTieredChunkCache(256, option.CacheDir, option.CacheSizeMB)
 	return &WebDavFileSystem{
 		option:     option,
 		chunkCache: chunkCache,
@@ -338,7 +334,7 @@ func (fs *WebDavFileSystem) stat(ctx context.Context, fullFilePath string) (os.F
 	if err != nil {
 		return nil, err
 	}
-	fi.size = int64(filer2.TotalSize(entry.GetChunks()))
+	fi.size = int64(filer2.FileSize(entry))
 	fi.name = string(fullpath)
 	fi.mode = os.FileMode(entry.Attributes.FileMode)
 	fi.modifiledTime = time.Unix(entry.Attributes.Mtime, 0)
@@ -470,7 +466,8 @@ func (f *WebDavFile) Read(p []byte) (readSize int, err error) {
 	if err != nil {
 		return 0, err
 	}
-	if len(f.entry.Chunks) == 0 {
+	fileSize := int64(filer2.FileSize(f.entry))
+	if fileSize == 0 {
 		return 0, io.EOF
 	}
 	if f.entryViewCache == nil {
@@ -479,7 +476,7 @@ func (f *WebDavFile) Read(p []byte) (readSize int, err error) {
 	}
 	if f.reader == nil {
 		chunkViews := filer2.ViewFromVisibleIntervals(f.entryViewCache, 0, math.MaxInt32)
-		f.reader = filer2.NewChunkReaderAtFromClient(f.fs, chunkViews, f.fs.chunkCache)
+		f.reader = filer2.NewChunkReaderAtFromClient(f.fs, chunkViews, f.fs.chunkCache, fileSize)
 	}
 
 	readSize, err = f.reader.ReadAt(p, f.off)
@@ -507,7 +504,7 @@ func (f *WebDavFile) Readdir(count int) (ret []os.FileInfo, err error) {
 
 	err = filer_pb.ReadDirAllEntries(f.fs, util.FullPath(dir), "", func(entry *filer_pb.Entry, isLast bool) error {
 		fi := FileInfo{
-			size:          int64(filer2.TotalSize(entry.GetChunks())),
+			size:          int64(filer2.FileSize(entry)),
 			name:          entry.Name,
 			mode:          os.FileMode(entry.Attributes.FileMode),
 			modifiledTime: time.Unix(entry.Attributes.Mtime, 0),
diff --git a/weed/shell/command_fs_du.go b/weed/shell/command_fs_du.go
index 96551dd5a..5404b0cdb 100644
--- a/weed/shell/command_fs_du.go
+++ b/weed/shell/command_fs_du.go
@@ -70,9 +70,9 @@ func duTraverseDirectory(writer io.Writer, filerClient filer_pb.FilerClient, dir
 			}
 		} else {
 			fileBlockCount = uint64(len(entry.Chunks))
-			fileByteCount = filer2.TotalSize(entry.Chunks)
-			blockCount += uint64(len(entry.Chunks))
-			byteCount += filer2.TotalSize(entry.Chunks)
+			fileByteCount = filer2.FileSize(entry)
+			blockCount += fileBlockCount
+			byteCount += fileByteCount
 		}
 
 		if name != "" && !entry.IsDirectory {
diff --git a/weed/shell/command_fs_ls.go b/weed/shell/command_fs_ls.go
index 36133992f..4110c7b8d 100644
--- a/weed/shell/command_fs_ls.go
+++ b/weed/shell/command_fs_ls.go
@@ -95,7 +95,7 @@ func (c *commandFsLs) Do(args []string, commandEnv *CommandEnv, writer io.Writer
 			fmt.Fprintf(writer, "%s %3d %s %s %6d %s/%s\n",
 				fileMode, len(entry.Chunks),
 				userName, groupName,
-				filer2.TotalSize(entry.Chunks), dir, entry.Name)
+				filer2.FileSize(entry), dir, entry.Name)
 		} else {
 			fmt.Fprintf(writer, "%s\n", entry.Name)
 		}
diff --git a/weed/shell/command_volume_move.go b/weed/shell/command_volume_move.go
index 392b947e7..37174d1d9 100644
--- a/weed/shell/command_volume_move.go
+++ b/weed/shell/command_volume_move.go
@@ -91,6 +91,43 @@ func LiveMoveVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, so
 
 func copyVolume(grpcDialOption grpc.DialOption, volumeId needle.VolumeId, sourceVolumeServer, targetVolumeServer string) (lastAppendAtNs uint64, err error) {
 
+	// check to see if the volume is already read-only and if its not then we need
+	// to mark it as read-only and then before we return we need to undo what we
+	// did
+	var shouldMarkWritable bool
+	defer func() {
+		if !shouldMarkWritable {
+			return
+		}
+
+		clientErr := operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+			_, writableErr := volumeServerClient.VolumeMarkWritable(context.Background(), &volume_server_pb.VolumeMarkWritableRequest{
+				VolumeId: uint32(volumeId),
+			})
+			return writableErr
+		})
+		if clientErr != nil {
+			log.Printf("failed to mark volume %d as writable after copy from %s: %v", volumeId, sourceVolumeServer, clientErr)
+		}
+	}()
+
+	err = operation.WithVolumeServerClient(sourceVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
+		resp, statusErr := volumeServerClient.VolumeStatus(context.Background(), &volume_server_pb.VolumeStatusRequest{
+			VolumeId: uint32(volumeId),
+		})
+		if statusErr == nil && !resp.IsReadOnly {
+			shouldMarkWritable = true
+			_, readonlyErr := volumeServerClient.VolumeMarkReadonly(context.Background(), &volume_server_pb.VolumeMarkReadonlyRequest{
+				VolumeId: uint32(volumeId),
+			})
+			return readonlyErr
+		}
+		return statusErr
+	})
+	if err != nil {
+		return
+	}
+
 	err = operation.WithVolumeServerClient(targetVolumeServer, grpcDialOption, func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 		resp, replicateErr := volumeServerClient.VolumeCopy(context.Background(), &volume_server_pb.VolumeCopyRequest{
 			VolumeId:       uint32(volumeId),
diff --git a/weed/storage/backend/volume_create.go b/weed/storage/backend/volume_create.go
index abb1f7238..d4bd8e40f 100644
--- a/weed/storage/backend/volume_create.go
+++ b/weed/storage/backend/volume_create.go
@@ -14,7 +14,7 @@ func CreateVolumeFile(fileName string, preallocate int64, memoryMapSizeMB uint32
 		return nil, e
 	}
 	if preallocate > 0 {
-		glog.V(0).Infof("Preallocated disk space for %s is not supported", fileName)
+		glog.V(2).Infof("Preallocated disk space for %s is not supported", fileName)
 	}
 	return NewDiskFile(file), nil
 }
diff --git a/weed/storage/erasure_coding/ec_decoder.go b/weed/storage/erasure_coding/ec_decoder.go
index 99bcb6ca5..795a7d523 100644
--- a/weed/storage/erasure_coding/ec_decoder.go
+++ b/weed/storage/erasure_coding/ec_decoder.go
@@ -52,9 +52,9 @@ func FindDatFileSize(baseFileName string) (datSize int64, err error) {
 		return 0, fmt.Errorf("read ec volume %s version: %v", baseFileName, err)
 	}
 
-	err = iterateEcxFile(baseFileName, func(key types.NeedleId, offset types.Offset, size uint32) error {
+	err = iterateEcxFile(baseFileName, func(key types.NeedleId, offset types.Offset, size types.Size) error {
 
-		if size == types.TombstoneFileSize {
+		if size.IsDeleted() {
 			return nil
 		}
 
@@ -88,7 +88,7 @@ func readEcVolumeVersion(baseFileName string) (version needle.Version, err error
 
 }
 
-func iterateEcxFile(baseFileName string, processNeedleFn func(key types.NeedleId, offset types.Offset, size uint32) error) error {
+func iterateEcxFile(baseFileName string, processNeedleFn func(key types.NeedleId, offset types.Offset, size types.Size) error) error {
 	ecxFile, openErr := os.OpenFile(baseFileName+".ecx", os.O_RDONLY, 0644)
 	if openErr != nil {
 		return fmt.Errorf("cannot open ec index %s.ecx: %v", baseFileName, openErr)
diff --git a/weed/storage/erasure_coding/ec_encoder.go b/weed/storage/erasure_coding/ec_encoder.go
index 5f0f20284..34b639407 100644
--- a/weed/storage/erasure_coding/ec_encoder.go
+++ b/weed/storage/erasure_coding/ec_encoder.go
@@ -294,7 +294,7 @@ func readNeedleMap(baseFileName string) (*needle_map.MemDb, error) {
 	defer indexFile.Close()
 
 	cm := needle_map.NewMemDb()
-	err = idx.WalkIndexFile(indexFile, func(key types.NeedleId, offset types.Offset, size uint32) error {
+	err = idx.WalkIndexFile(indexFile, func(key types.NeedleId, offset types.Offset, size types.Size) error {
 		if !offset.IsZero() && size != types.TombstoneFileSize {
 			cm.Set(key, offset, size)
 		} else {
diff --git a/weed/storage/erasure_coding/ec_locate.go b/weed/storage/erasure_coding/ec_locate.go
index 562966f8f..19eba6235 100644
--- a/weed/storage/erasure_coding/ec_locate.go
+++ b/weed/storage/erasure_coding/ec_locate.go
@@ -1,14 +1,18 @@
 package erasure_coding
 
+import (
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
+)
+
 type Interval struct {
 	BlockIndex          int
 	InnerBlockOffset    int64
-	Size                uint32
+	Size                types.Size
 	IsLargeBlock        bool
 	LargeBlockRowsCount int
 }
 
-func LocateData(largeBlockLength, smallBlockLength int64, datSize int64, offset int64, size uint32) (intervals []Interval) {
+func LocateData(largeBlockLength, smallBlockLength int64, datSize int64, offset int64, size types.Size) (intervals []Interval) {
 	blockIndex, isLargeBlock, innerBlockOffset := locateOffset(largeBlockLength, smallBlockLength, datSize, offset)
 
 	// adding DataShardsCount*smallBlockLength to ensure we can derive the number of large block size from a shard size
@@ -32,7 +36,7 @@ func LocateData(largeBlockLength, smallBlockLength int64, datSize int64, offset
 			intervals = append(intervals, interval)
 			return
 		}
-		interval.Size = uint32(blockRemaining)
+		interval.Size = types.Size(blockRemaining)
 		intervals = append(intervals, interval)
 
 		size -= interval.Size
diff --git a/weed/storage/erasure_coding/ec_test.go b/weed/storage/erasure_coding/ec_test.go
index 92b83cdc8..63cc2c352 100644
--- a/weed/storage/erasure_coding/ec_test.go
+++ b/weed/storage/erasure_coding/ec_test.go
@@ -71,7 +71,7 @@ func validateFiles(baseFileName string) error {
 	return nil
 }
 
-func assertSame(datFile *os.File, datSize int64, ecFiles []*os.File, offset types.Offset, size uint32) error {
+func assertSame(datFile *os.File, datSize int64, ecFiles []*os.File, offset types.Offset, size types.Size) error {
 
 	data, err := readDatFile(datFile, offset, size)
 	if err != nil {
@@ -90,7 +90,7 @@ func assertSame(datFile *os.File, datSize int64, ecFiles []*os.File, offset type
 	return nil
 }
 
-func readDatFile(datFile *os.File, offset types.Offset, size uint32) ([]byte, error) {
+func readDatFile(datFile *os.File, offset types.Offset, size types.Size) ([]byte, error) {
 
 	data := make([]byte, size)
 	n, err := datFile.ReadAt(data, offset.ToAcutalOffset())
@@ -103,7 +103,7 @@ func readDatFile(datFile *os.File, offset types.Offset, size uint32) ([]byte, er
 	return data, nil
 }
 
-func readEcFile(datSize int64, ecFiles []*os.File, offset types.Offset, size uint32) (data []byte, err error) {
+func readEcFile(datSize int64, ecFiles []*os.File, offset types.Offset, size types.Size) (data []byte, err error) {
 
 	intervals := LocateData(largeBlockSize, smallBlockSize, datSize, offset.ToAcutalOffset(), size)
 
@@ -140,7 +140,7 @@ func readOneInterval(interval Interval, ecFiles []*os.File) (data []byte, err er
 	return
 }
 
-func readFromOtherEcFiles(ecFiles []*os.File, ecFileIndex int, ecFileOffset int64, size uint32) (data []byte, err error) {
+func readFromOtherEcFiles(ecFiles []*os.File, ecFileIndex int, ecFileOffset int64, size types.Size) (data []byte, err error) {
 	enc, err := reedsolomon.New(DataShardsCount, ParityShardsCount)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create encoder: %v", err)
diff --git a/weed/storage/erasure_coding/ec_volume.go b/weed/storage/erasure_coding/ec_volume.go
index eef53765f..785f33ec4 100644
--- a/weed/storage/erasure_coding/ec_volume.go
+++ b/weed/storage/erasure_coding/ec_volume.go
@@ -187,7 +187,7 @@ func (ev *EcVolume) ToVolumeEcShardInformationMessage() (messages []*master_pb.V
 	return
 }
 
-func (ev *EcVolume) LocateEcShardNeedle(needleId types.NeedleId, version needle.Version) (offset types.Offset, size uint32, intervals []Interval, err error) {
+func (ev *EcVolume) LocateEcShardNeedle(needleId types.NeedleId, version needle.Version) (offset types.Offset, size types.Size, intervals []Interval, err error) {
 
 	// find the needle from ecx file
 	offset, size, err = ev.FindNeedleFromEcx(needleId)
@@ -198,16 +198,16 @@ func (ev *EcVolume) LocateEcShardNeedle(needleId types.NeedleId, version needle.
 	shard := ev.Shards[0]
 
 	// calculate the locations in the ec shards
-	intervals = LocateData(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, DataShardsCount*shard.ecdFileSize, offset.ToAcutalOffset(), uint32(needle.GetActualSize(size, version)))
+	intervals = LocateData(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, DataShardsCount*shard.ecdFileSize, offset.ToAcutalOffset(), types.Size(needle.GetActualSize(size, version)))
 
 	return
 }
 
-func (ev *EcVolume) FindNeedleFromEcx(needleId types.NeedleId) (offset types.Offset, size uint32, err error) {
+func (ev *EcVolume) FindNeedleFromEcx(needleId types.NeedleId) (offset types.Offset, size types.Size, err error) {
 	return SearchNeedleFromSortedIndex(ev.ecxFile, ev.ecxFileSize, needleId, nil)
 }
 
-func SearchNeedleFromSortedIndex(ecxFile *os.File, ecxFileSize int64, needleId types.NeedleId, processNeedleFn func(file *os.File, offset int64) error) (offset types.Offset, size uint32, err error) {
+func SearchNeedleFromSortedIndex(ecxFile *os.File, ecxFileSize int64, needleId types.NeedleId, processNeedleFn func(file *os.File, offset int64) error) (offset types.Offset, size types.Size, err error) {
 	var key types.NeedleId
 	buf := make([]byte, types.NeedleMapEntrySize)
 	l, h := int64(0), ecxFileSize/types.NeedleMapEntrySize
diff --git a/weed/storage/erasure_coding/ec_volume_delete.go b/weed/storage/erasure_coding/ec_volume_delete.go
index 822a9e923..a7f8c24a3 100644
--- a/weed/storage/erasure_coding/ec_volume_delete.go
+++ b/weed/storage/erasure_coding/ec_volume_delete.go
@@ -12,7 +12,7 @@ import (
 var (
 	MarkNeedleDeleted = func(file *os.File, offset int64) error {
 		b := make([]byte, types.SizeSize)
-		util.Uint32toBytes(b, types.TombstoneFileSize)
+		types.SizeToBytes(b, types.TombstoneFileSize)
 		n, err := file.WriteAt(b, offset+types.NeedleIdSize+types.OffsetSize)
 		if err != nil {
 			return fmt.Errorf("sorted needle write error: %v", err)
diff --git a/weed/storage/erasure_coding/ec_volume_test.go b/weed/storage/erasure_coding/ec_volume_test.go
index 9a3b1e644..fe45bf722 100644
--- a/weed/storage/erasure_coding/ec_volume_test.go
+++ b/weed/storage/erasure_coding/ec_volume_test.go
@@ -44,7 +44,7 @@ func TestPositioning(t *testing.T) {
 	fmt.Printf("offset: %d size: %d\n", offset.ToAcutalOffset(), size)
 
 	var shardEcdFileSize int64 = 1118830592 // 1024*1024*1024*3
-	intervals := LocateData(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, DataShardsCount*shardEcdFileSize, offset.ToAcutalOffset(), uint32(needle.GetActualSize(size, needle.CurrentVersion)))
+	intervals := LocateData(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, DataShardsCount*shardEcdFileSize, offset.ToAcutalOffset(), types.Size(needle.GetActualSize(size, needle.CurrentVersion)))
 
 	for _, interval := range intervals {
 		shardId, shardOffset := interval.ToShardIdAndOffset(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize)
diff --git a/weed/storage/idx/walk.go b/weed/storage/idx/walk.go
index 44140d142..5215d3c4f 100644
--- a/weed/storage/idx/walk.go
+++ b/weed/storage/idx/walk.go
@@ -5,21 +5,23 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/storage/types"
-	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 // walks through the index file, calls fn function with each key, offset, size
 // stops with the error returned by the fn function
-func WalkIndexFile(r io.ReaderAt, fn func(key types.NeedleId, offset types.Offset, size uint32) error) error {
+func WalkIndexFile(r io.ReaderAt, fn func(key types.NeedleId, offset types.Offset, size types.Size) error) error {
 	var readerOffset int64
 	bytes := make([]byte, types.NeedleMapEntrySize*RowsToRead)
 	count, e := r.ReadAt(bytes, readerOffset)
+	if count == 0 && e == io.EOF {
+		return nil
+	}
 	glog.V(3).Infof("readerOffset %d count %d err: %v", readerOffset, count, e)
 	readerOffset += int64(count)
 	var (
 		key    types.NeedleId
 		offset types.Offset
-		size   uint32
+		size   types.Size
 		i      int
 	)
 
@@ -40,10 +42,10 @@ func WalkIndexFile(r io.ReaderAt, fn func(key types.NeedleId, offset types.Offse
 	return e
 }
 
-func IdxFileEntry(bytes []byte) (key types.NeedleId, offset types.Offset, size uint32) {
+func IdxFileEntry(bytes []byte) (key types.NeedleId, offset types.Offset, size types.Size) {
 	key = types.BytesToNeedleId(bytes[:types.NeedleIdSize])
 	offset = types.BytesToOffset(bytes[types.NeedleIdSize : types.NeedleIdSize+types.OffsetSize])
-	size = util.BytesToUint32(bytes[types.NeedleIdSize+types.OffsetSize : types.NeedleIdSize+types.OffsetSize+types.SizeSize])
+	size = types.BytesToSize(bytes[types.NeedleIdSize+types.OffsetSize : types.NeedleIdSize+types.OffsetSize+types.SizeSize])
 	return
 }
 
diff --git a/weed/storage/needle/needle.go b/weed/storage/needle/needle.go
index 7c7aa3feb..0d962886b 100644
--- a/weed/storage/needle/needle.go
+++ b/weed/storage/needle/needle.go
@@ -24,7 +24,7 @@ const (
 type Needle struct {
 	Cookie Cookie   `comment:"random number to mitigate brute force lookups"`
 	Id     NeedleId `comment:"needle id"`
-	Size   uint32   `comment:"sum of DataSize,Data,NameSize,Name,MimeSize,Mime"`
+	Size   Size   `comment:"sum of DataSize,Data,NameSize,Name,MimeSize,Mime"`
 
 	DataSize     uint32 `comment:"Data size"` //version2
 	Data         []byte `comment:"The actual file data"`
diff --git a/weed/storage/needle/needle_read_write.go b/weed/storage/needle/needle_read_write.go
index 575a72e40..89fc85b0d 100644
--- a/weed/storage/needle/needle_read_write.go
+++ b/weed/storage/needle/needle_read_write.go
@@ -28,7 +28,7 @@ func (n *Needle) DiskSize(version Version) int64 {
 	return GetActualSize(n.Size, version)
 }
 
-func (n *Needle) prepareWriteBuffer(version Version) ([]byte, uint32, int64, error) {
+func (n *Needle) prepareWriteBuffer(version Version) ([]byte, Size, int64, error) {
 
 	writeBytes := make([]byte, 0)
 
@@ -37,8 +37,8 @@ func (n *Needle) prepareWriteBuffer(version Version) ([]byte, uint32, int64, err
 		header := make([]byte, NeedleHeaderSize)
 		CookieToBytes(header[0:CookieSize], n.Cookie)
 		NeedleIdToBytes(header[CookieSize:CookieSize+NeedleIdSize], n.Id)
-		n.Size = uint32(len(n.Data))
-		util.Uint32toBytes(header[CookieSize+NeedleIdSize:CookieSize+NeedleIdSize+SizeSize], n.Size)
+		n.Size = Size(len(n.Data))
+		SizeToBytes(header[CookieSize+NeedleIdSize:CookieSize+NeedleIdSize+SizeSize], n.Size)
 		size := n.Size
 		actualSize := NeedleHeaderSize + int64(n.Size)
 		writeBytes = append(writeBytes, header...)
@@ -58,12 +58,12 @@ func (n *Needle) prepareWriteBuffer(version Version) ([]byte, uint32, int64, err
 		}
 		n.DataSize, n.MimeSize = uint32(len(n.Data)), uint8(len(n.Mime))
 		if n.DataSize > 0 {
-			n.Size = 4 + n.DataSize + 1
+			n.Size = 4 + Size(n.DataSize) + 1
 			if n.HasName() {
-				n.Size = n.Size + 1 + uint32(n.NameSize)
+				n.Size = n.Size + 1 + Size(n.NameSize)
 			}
 			if n.HasMime() {
-				n.Size = n.Size + 1 + uint32(n.MimeSize)
+				n.Size = n.Size + 1 + Size(n.MimeSize)
 			}
 			if n.HasLastModifiedDate() {
 				n.Size = n.Size + LastModifiedBytesLength
@@ -72,12 +72,12 @@ func (n *Needle) prepareWriteBuffer(version Version) ([]byte, uint32, int64, err
 				n.Size = n.Size + TtlBytesLength
 			}
 			if n.HasPairs() {
-				n.Size += 2 + uint32(n.PairsSize)
+				n.Size += 2 + Size(n.PairsSize)
 			}
 		} else {
 			n.Size = 0
 		}
-		util.Uint32toBytes(header[CookieSize+NeedleIdSize:CookieSize+NeedleIdSize+SizeSize], n.Size)
+		SizeToBytes(header[CookieSize+NeedleIdSize:CookieSize+NeedleIdSize+SizeSize], n.Size)
 		writeBytes = append(writeBytes, header[0:NeedleHeaderSize]...)
 		if n.DataSize > 0 {
 			util.Uint32toBytes(header[0:4], n.DataSize)
@@ -119,13 +119,13 @@ func (n *Needle) prepareWriteBuffer(version Version) ([]byte, uint32, int64, err
 			writeBytes = append(writeBytes, header[0:NeedleChecksumSize+TimestampSize+padding]...)
 		}
 
-		return writeBytes, n.DataSize, GetActualSize(n.Size, version), nil
+		return writeBytes, Size(n.DataSize), GetActualSize(n.Size, version), nil
 	}
 
 	return writeBytes, 0, 0, fmt.Errorf("Unsupported Version! (%d)", version)
 }
 
-func (n *Needle) Append(w backend.BackendStorageFile, version Version) (offset uint64, size uint32, actualSize int64, err error) {
+func (n *Needle) Append(w backend.BackendStorageFile, version Version) (offset uint64, size Size, actualSize int64, err error) {
 
 	if end, _, e := w.GetStat(); e == nil {
 		defer func(w backend.BackendStorageFile, off int64) {
@@ -154,7 +154,7 @@ func (n *Needle) Append(w backend.BackendStorageFile, version Version) (offset u
 	return offset, size, actualSize, err
 }
 
-func ReadNeedleBlob(r backend.BackendStorageFile, offset int64, size uint32, version Version) (dataSlice []byte, err error) {
+func ReadNeedleBlob(r backend.BackendStorageFile, offset int64, size Size, version Version) (dataSlice []byte, err error) {
 
 	dataSize := GetActualSize(size, version)
 	dataSlice = make([]byte, int(dataSize))
@@ -165,7 +165,7 @@ func ReadNeedleBlob(r backend.BackendStorageFile, offset int64, size uint32, ver
 }
 
 // ReadBytes hydrates the needle from the bytes buffer, with only n.Id is set.
-func (n *Needle) ReadBytes(bytes []byte, offset int64, size uint32, version Version) (err error) {
+func (n *Needle) ReadBytes(bytes []byte, offset int64, size Size, version Version) (err error) {
 	n.ParseNeedleHeader(bytes)
 	if n.Size != size {
 		return fmt.Errorf("entry not found: offset %d found id %x size %d, expected size %d", offset, n.Id, n.Size, size)
@@ -195,7 +195,7 @@ func (n *Needle) ReadBytes(bytes []byte, offset int64, size uint32, version Vers
 }
 
 // ReadData hydrates the needle from the file, with only n.Id is set.
-func (n *Needle) ReadData(r backend.BackendStorageFile, offset int64, size uint32, version Version) (err error) {
+func (n *Needle) ReadData(r backend.BackendStorageFile, offset int64, size Size, version Version) (err error) {
 	bytes, err := ReadNeedleBlob(r, offset, size, version)
 	if err != nil {
 		return err
@@ -206,7 +206,7 @@ func (n *Needle) ReadData(r backend.BackendStorageFile, offset int64, size uint3
 func (n *Needle) ParseNeedleHeader(bytes []byte) {
 	n.Cookie = BytesToCookie(bytes[0:CookieSize])
 	n.Id = BytesToNeedleId(bytes[CookieSize : CookieSize+NeedleIdSize])
-	n.Size = util.BytesToUint32(bytes[CookieSize+NeedleIdSize : NeedleHeaderSize])
+	n.Size = BytesToSize(bytes[CookieSize+NeedleIdSize : NeedleHeaderSize])
 }
 
 func (n *Needle) readNeedleDataVersion2(bytes []byte) (err error) {
@@ -288,7 +288,7 @@ func ReadNeedleHeader(r backend.BackendStorageFile, version Version, offset int6
 	return
 }
 
-func PaddingLength(needleSize uint32, version Version) uint32 {
+func PaddingLength(needleSize Size, version Version) Size {
 	if version == Version3 {
 		// this is same value as version2, but just listed here for clarity
 		return NeedlePaddingSize - ((NeedleHeaderSize + needleSize + NeedleChecksumSize + TimestampSize) % NeedlePaddingSize)
@@ -296,7 +296,7 @@ func PaddingLength(needleSize uint32, version Version) uint32 {
 	return NeedlePaddingSize - ((NeedleHeaderSize + needleSize + NeedleChecksumSize) % NeedlePaddingSize)
 }
 
-func NeedleBodyLength(needleSize uint32, version Version) int64 {
+func NeedleBodyLength(needleSize Size, version Version) int64 {
 	if version == Version3 {
 		return int64(needleSize) + NeedleChecksumSize + TimestampSize + int64(PaddingLength(needleSize, version))
 	}
@@ -390,6 +390,6 @@ func (n *Needle) SetHasPairs() {
 	n.Flags = n.Flags | FlagHasPairs
 }
 
-func GetActualSize(size uint32, version Version) int64 {
+func GetActualSize(size Size, version Version) int64 {
 	return NeedleHeaderSize + NeedleBodyLength(size, version)
 }
diff --git a/weed/storage/needle_map.go b/weed/storage/needle_map.go
index 8962e78cb..e91856dfe 100644
--- a/weed/storage/needle_map.go
+++ b/weed/storage/needle_map.go
@@ -19,7 +19,7 @@ const (
 )
 
 type NeedleMapper interface {
-	Put(key NeedleId, offset Offset, size uint32) error
+	Put(key NeedleId, offset Offset, size Size) error
 	Get(key NeedleId) (element *needle_map.NeedleValue, ok bool)
 	Delete(key NeedleId, offset Offset) error
 	Close()
@@ -48,7 +48,7 @@ func (nm *baseNeedleMapper) IndexFileSize() uint64 {
 	return 0
 }
 
-func (nm *baseNeedleMapper) appendToIndexFile(key NeedleId, offset Offset, size uint32) error {
+func (nm *baseNeedleMapper) appendToIndexFile(key NeedleId, offset Offset, size Size) error {
 	bytes := needle_map.ToBytes(key, offset, size)
 
 	nm.indexFileAccessLock.Lock()
diff --git a/weed/storage/needle_map/compact_map.go b/weed/storage/needle_map/compact_map.go
index 76783d0b0..81ff27c45 100644
--- a/weed/storage/needle_map/compact_map.go
+++ b/weed/storage/needle_map/compact_map.go
@@ -18,7 +18,7 @@ const SectionalNeedleIdLimit = 1<<32 - 1
 type SectionalNeedleValue struct {
 	Key         SectionalNeedleId
 	OffsetLower OffsetLower `comment:"Volume offset"` //since aligned to 8 bytes, range is 4G*8=32G
-	Size        uint32      `comment:"Size of the data portion"`
+	Size        Size      `comment:"Size of the data portion"`
 }
 
 type SectionalNeedleValueExtra struct {
@@ -50,7 +50,7 @@ func NewCompactSection(start NeedleId) *CompactSection {
 }
 
 //return old entry size
-func (cs *CompactSection) Set(key NeedleId, offset Offset, size uint32) (oldOffset Offset, oldSize uint32) {
+func (cs *CompactSection) Set(key NeedleId, offset Offset, size Size) (oldOffset Offset, oldSize Size) {
 	cs.Lock()
 	if key > cs.end {
 		cs.end = key
@@ -80,7 +80,7 @@ func (cs *CompactSection) Set(key NeedleId, offset Offset, size uint32) (oldOffs
 	return
 }
 
-func (cs *CompactSection) setOverflowEntry(skey SectionalNeedleId, offset Offset, size uint32) {
+func (cs *CompactSection) setOverflowEntry(skey SectionalNeedleId, offset Offset, size Size) {
 	needleValue := SectionalNeedleValue{Key: skey, OffsetLower: offset.OffsetLower, Size: size}
 	needleValueExtra := SectionalNeedleValueExtra{OffsetHigher: offset.OffsetHigher}
 	insertCandidate := sort.Search(len(cs.overflow), func(i int) bool {
@@ -115,24 +115,21 @@ func (cs *CompactSection) deleteOverflowEntry(key SectionalNeedleId) {
 		return cs.overflow[i].Key >= key
 	})
 	if deleteCandidate != length && cs.overflow[deleteCandidate].Key == key {
-		for i := deleteCandidate; i < length-1; i++ {
-			cs.overflow[i] = cs.overflow[i+1]
-			cs.overflowExtra[i] = cs.overflowExtra[i+1]
+		if cs.overflow[deleteCandidate].Size.IsValid() {
+			cs.overflow[deleteCandidate].Size = - cs.overflow[deleteCandidate].Size
 		}
-		cs.overflow = cs.overflow[0 : length-1]
-		cs.overflowExtra = cs.overflowExtra[0 : length-1]
 	}
 }
 
 //return old entry size
-func (cs *CompactSection) Delete(key NeedleId) uint32 {
+func (cs *CompactSection) Delete(key NeedleId) Size {
 	skey := SectionalNeedleId(key - cs.start)
 	cs.Lock()
-	ret := uint32(0)
+	ret := Size(0)
 	if i := cs.binarySearchValues(skey); i >= 0 {
-		if cs.values[i].Size > 0 && cs.values[i].Size != TombstoneFileSize {
+		if cs.values[i].Size > 0 && cs.values[i].Size.IsValid() {
 			ret = cs.values[i].Size
-			cs.values[i].Size = TombstoneFileSize
+			cs.values[i].Size = -cs.values[i].Size
 		}
 	}
 	if _, v, found := cs.findOverflowEntry(skey); found {
@@ -181,7 +178,7 @@ func NewCompactMap() *CompactMap {
 	return &CompactMap{}
 }
 
-func (cm *CompactMap) Set(key NeedleId, offset Offset, size uint32) (oldOffset Offset, oldSize uint32) {
+func (cm *CompactMap) Set(key NeedleId, offset Offset, size Size) (oldOffset Offset, oldSize Size) {
 	x := cm.binarySearchCompactSection(key)
 	if x < 0 || (key-cm.list[x].start) > SectionalNeedleIdLimit {
 		// println(x, "adding to existing", len(cm.list), "sections, starting", key)
@@ -204,10 +201,10 @@ func (cm *CompactMap) Set(key NeedleId, offset Offset, size uint32) (oldOffset O
 	// println(key, "set to section[", x, "].start", cm.list[x].start)
 	return cm.list[x].Set(key, offset, size)
 }
-func (cm *CompactMap) Delete(key NeedleId) uint32 {
+func (cm *CompactMap) Delete(key NeedleId) Size {
 	x := cm.binarySearchCompactSection(key)
 	if x < 0 {
-		return uint32(0)
+		return Size(0)
 	}
 	return cm.list[x].Delete(key)
 }
diff --git a/weed/storage/needle_map/compact_map_perf_test.go b/weed/storage/needle_map/compact_map_perf_test.go
index cce1f9490..081fb34e9 100644
--- a/weed/storage/needle_map/compact_map_perf_test.go
+++ b/weed/storage/needle_map/compact_map_perf_test.go
@@ -9,7 +9,6 @@ import (
 	"time"
 
 	. "github.com/chrislusf/seaweedfs/weed/storage/types"
-	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 /*
@@ -60,7 +59,7 @@ func loadNewNeedleMap(file *os.File) (*CompactMap, uint64) {
 			rowCount++
 			key := BytesToNeedleId(bytes[i : i+NeedleIdSize])
 			offset := BytesToOffset(bytes[i+NeedleIdSize : i+NeedleIdSize+OffsetSize])
-			size := util.BytesToUint32(bytes[i+NeedleIdSize+OffsetSize : i+NeedleIdSize+OffsetSize+SizeSize])
+			size := BytesToSize(bytes[i+NeedleIdSize+OffsetSize : i+NeedleIdSize+OffsetSize+SizeSize])
 
 			if !offset.IsZero() {
 				m.Set(NeedleId(key), offset, size)
diff --git a/weed/storage/needle_map/compact_map_test.go b/weed/storage/needle_map/compact_map_test.go
index 7eea3969a..199cb26b3 100644
--- a/weed/storage/needle_map/compact_map_test.go
+++ b/weed/storage/needle_map/compact_map_test.go
@@ -49,7 +49,7 @@ func TestIssue52(t *testing.T) {
 func TestCompactMap(t *testing.T) {
 	m := NewCompactMap()
 	for i := uint32(0); i < 100*batch; i += 2 {
-		m.Set(NeedleId(i), ToOffset(int64(i)), i)
+		m.Set(NeedleId(i), ToOffset(int64(i)), Size(i))
 	}
 
 	for i := uint32(0); i < 100*batch; i += 37 {
@@ -57,7 +57,7 @@ func TestCompactMap(t *testing.T) {
 	}
 
 	for i := uint32(0); i < 10*batch; i += 3 {
-		m.Set(NeedleId(i), ToOffset(int64(i+11)), i+5)
+		m.Set(NeedleId(i), ToOffset(int64(i+11)), Size(i+5))
 	}
 
 	//	for i := uint32(0); i < 100; i++ {
@@ -72,15 +72,15 @@ func TestCompactMap(t *testing.T) {
 			if !ok {
 				t.Fatal("key", i, "missing!")
 			}
-			if v.Size != i+5 {
+			if v.Size != Size(i+5) {
 				t.Fatal("key", i, "size", v.Size)
 			}
 		} else if i%37 == 0 {
-			if ok && v.Size != TombstoneFileSize {
+			if ok && v.Size.IsValid() {
 				t.Fatal("key", i, "should have been deleted needle value", v)
 			}
 		} else if i%2 == 0 {
-			if v.Size != i {
+			if v.Size != Size(i) {
 				t.Fatal("key", i, "size", v.Size)
 			}
 		}
@@ -89,14 +89,14 @@ func TestCompactMap(t *testing.T) {
 	for i := uint32(10 * batch); i < 100*batch; i++ {
 		v, ok := m.Get(NeedleId(i))
 		if i%37 == 0 {
-			if ok && v.Size != TombstoneFileSize {
+			if ok && v.Size.IsValid() {
 				t.Fatal("key", i, "should have been deleted needle value", v)
 			}
 		} else if i%2 == 0 {
 			if v == nil {
 				t.Fatal("key", i, "missing")
 			}
-			if v.Size != i {
+			if v.Size != Size(i) {
 				t.Fatal("key", i, "size", v.Size)
 			}
 		}
@@ -129,8 +129,8 @@ func TestOverflow(t *testing.T) {
 
 	cs.deleteOverflowEntry(4)
 
-	if len(cs.overflow) != 4 {
-		t.Fatalf("expecting 4 entries now: %+v", cs.overflow)
+	if len(cs.overflow) != 5 {
+		t.Fatalf("expecting 5 entries now: %+v", cs.overflow)
 	}
 
 	_, x, _ := cs.findOverflowEntry(5)
@@ -146,7 +146,7 @@ func TestOverflow(t *testing.T) {
 	cs.deleteOverflowEntry(1)
 
 	for i, x := range cs.overflow {
-		println("overflow[", i, "]:", x.Key)
+		println("overflow[", i, "]:", x.Key, "size", x.Size)
 	}
 	println()
 
diff --git a/weed/storage/needle_map/memdb.go b/weed/storage/needle_map/memdb.go
index a52d52a10..b25b5e89a 100644
--- a/weed/storage/needle_map/memdb.go
+++ b/weed/storage/needle_map/memdb.go
@@ -11,7 +11,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/storage/idx"
 	. "github.com/chrislusf/seaweedfs/weed/storage/types"
-	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 //This map uses in memory level db
@@ -32,7 +31,7 @@ func NewMemDb() *MemDb {
 	return t
 }
 
-func (cm *MemDb) Set(key NeedleId, offset Offset, size uint32) error {
+func (cm *MemDb) Set(key NeedleId, offset Offset, size Size) error {
 
 	bytes := ToBytes(key, offset, size)
 
@@ -56,7 +55,7 @@ func (cm *MemDb) Get(key NeedleId) (*NeedleValue, bool) {
 		return nil, false
 	}
 	offset := BytesToOffset(data[0:OffsetSize])
-	size := util.BytesToUint32(data[OffsetSize : OffsetSize+SizeSize])
+	size := BytesToSize(data[OffsetSize : OffsetSize+SizeSize])
 	return &NeedleValue{Key: key, Offset: offset, Size: size}, true
 }
 
@@ -67,7 +66,7 @@ func (cm *MemDb) AscendingVisit(visit func(NeedleValue) error) (ret error) {
 		key := BytesToNeedleId(iter.Key())
 		data := iter.Value()
 		offset := BytesToOffset(data[0:OffsetSize])
-		size := util.BytesToUint32(data[OffsetSize : OffsetSize+SizeSize])
+		size := BytesToSize(data[OffsetSize : OffsetSize+SizeSize])
 
 		needle := NeedleValue{Key: key, Offset: offset, Size: size}
 		ret = visit(needle)
@@ -89,7 +88,7 @@ func (cm *MemDb) SaveToIdx(idxName string) (ret error) {
 	defer idxFile.Close()
 
 	return cm.AscendingVisit(func(value NeedleValue) error {
-		if value.Offset.IsZero() || value.Size == TombstoneFileSize {
+		if value.Offset.IsZero() || value.Size.IsDeleted() {
 			return nil
 		}
 		_, err := idxFile.Write(value.ToBytes())
@@ -105,8 +104,8 @@ func (cm *MemDb) LoadFromIdx(idxName string) (ret error) {
 	}
 	defer idxFile.Close()
 
-	return idx.WalkIndexFile(idxFile, func(key NeedleId, offset Offset, size uint32) error {
-		if offset.IsZero() || size == TombstoneFileSize {
+	return idx.WalkIndexFile(idxFile, func(key NeedleId, offset Offset, size Size) error {
+		if offset.IsZero() || size.IsDeleted() {
 			return cm.Delete(key)
 		}
 		return cm.Set(key, offset, size)
diff --git a/weed/storage/needle_map/needle_value.go b/weed/storage/needle_map/needle_value.go
index ef540b55e..f4687cb79 100644
--- a/weed/storage/needle_map/needle_value.go
+++ b/weed/storage/needle_map/needle_value.go
@@ -9,7 +9,7 @@ import (
 type NeedleValue struct {
 	Key    NeedleId
 	Offset Offset `comment:"Volume offset"` //since aligned to 8 bytes, range is 4G*8=32G
-	Size   uint32 `comment:"Size of the data portion"`
+	Size   Size `comment:"Size of the data portion"`
 }
 
 func (this NeedleValue) Less(than btree.Item) bool {
@@ -21,10 +21,10 @@ func (nv NeedleValue) ToBytes() []byte {
 	return ToBytes(nv.Key, nv.Offset, nv.Size)
 }
 
-func ToBytes(key NeedleId, offset Offset, size uint32) []byte {
+func ToBytes(key NeedleId, offset Offset, size Size) []byte {
 	bytes := make([]byte, NeedleIdSize+OffsetSize+SizeSize)
 	NeedleIdToBytes(bytes[0:NeedleIdSize], key)
 	OffsetToBytes(bytes[NeedleIdSize:NeedleIdSize+OffsetSize], offset)
-	util.Uint32toBytes(bytes[NeedleIdSize+OffsetSize:NeedleIdSize+OffsetSize+SizeSize], size)
+	util.Uint32toBytes(bytes[NeedleIdSize+OffsetSize:NeedleIdSize+OffsetSize+SizeSize], uint32(size))
 	return bytes
 }
diff --git a/weed/storage/needle_map/needle_value_map.go b/weed/storage/needle_map/needle_value_map.go
index 0a5a00ef7..a30cb96c4 100644
--- a/weed/storage/needle_map/needle_value_map.go
+++ b/weed/storage/needle_map/needle_value_map.go
@@ -5,8 +5,8 @@ import (
 )
 
 type NeedleValueMap interface {
-	Set(key NeedleId, offset Offset, size uint32) (oldOffset Offset, oldSize uint32)
-	Delete(key NeedleId) uint32
+	Set(key NeedleId, offset Offset, size Size) (oldOffset Offset, oldSize Size)
+	Delete(key NeedleId) Size
 	Get(key NeedleId) (*NeedleValue, bool)
 	AscendingVisit(visit func(NeedleValue) error) error
 }
diff --git a/weed/storage/needle_map_leveldb.go b/weed/storage/needle_map_leveldb.go
index 83589c231..415cd14dd 100644
--- a/weed/storage/needle_map_leveldb.go
+++ b/weed/storage/needle_map_leveldb.go
@@ -15,7 +15,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle_map"
 	. "github.com/chrislusf/seaweedfs/weed/storage/types"
-	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 type LevelDbNeedleMap struct {
@@ -74,8 +73,8 @@ func generateLevelDbFile(dbFileName string, indexFile *os.File) error {
 		return err
 	}
 	defer db.Close()
-	return idx.WalkIndexFile(indexFile, func(key NeedleId, offset Offset, size uint32) error {
-		if !offset.IsZero() && size != TombstoneFileSize {
+	return idx.WalkIndexFile(indexFile, func(key NeedleId, offset Offset, size Size) error {
+		if !offset.IsZero() && size.IsValid() {
 			levelDbWrite(db, key, offset, size)
 		} else {
 			levelDbDelete(db, key)
@@ -92,12 +91,12 @@ func (m *LevelDbNeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue, o
 		return nil, false
 	}
 	offset := BytesToOffset(data[0:OffsetSize])
-	size := util.BytesToUint32(data[OffsetSize : OffsetSize+SizeSize])
+	size := BytesToSize(data[OffsetSize : OffsetSize+SizeSize])
 	return &needle_map.NeedleValue{Key: key, Offset: offset, Size: size}, true
 }
 
-func (m *LevelDbNeedleMap) Put(key NeedleId, offset Offset, size uint32) error {
-	var oldSize uint32
+func (m *LevelDbNeedleMap) Put(key NeedleId, offset Offset, size Size) error {
+	var oldSize Size
 	if oldNeedle, ok := m.Get(key); ok {
 		oldSize = oldNeedle.Size
 	}
@@ -109,7 +108,7 @@ func (m *LevelDbNeedleMap) Put(key NeedleId, offset Offset, size uint32) error {
 	return levelDbWrite(m.db, key, offset, size)
 }
 
-func levelDbWrite(db *leveldb.DB, key NeedleId, offset Offset, size uint32) error {
+func levelDbWrite(db *leveldb.DB, key NeedleId, offset Offset, size Size) error {
 
 	bytes := needle_map.ToBytes(key, offset, size)
 
@@ -125,14 +124,18 @@ func levelDbDelete(db *leveldb.DB, key NeedleId) error {
 }
 
 func (m *LevelDbNeedleMap) Delete(key NeedleId, offset Offset) error {
-	if oldNeedle, ok := m.Get(key); ok {
-		m.logDelete(oldNeedle.Size)
+	oldNeedle, found := m.Get(key)
+	if !found || oldNeedle.Size.IsDeleted() {
+		return nil
 	}
+	m.logDelete(oldNeedle.Size)
+
 	// write to index file first
 	if err := m.appendToIndexFile(key, offset, TombstoneFileSize); err != nil {
 		return err
 	}
-	return levelDbDelete(m.db, key)
+
+	return levelDbWrite(m.db, key, oldNeedle.Offset, -oldNeedle.Size)
 }
 
 func (m *LevelDbNeedleMap) Close() {
diff --git a/weed/storage/needle_map_memory.go b/weed/storage/needle_map_memory.go
index 84197912f..d0891dc98 100644
--- a/weed/storage/needle_map_memory.go
+++ b/weed/storage/needle_map_memory.go
@@ -28,13 +28,13 @@ func LoadCompactNeedleMap(file *os.File) (*NeedleMap, error) {
 }
 
 func doLoading(file *os.File, nm *NeedleMap) (*NeedleMap, error) {
-	e := idx.WalkIndexFile(file, func(key NeedleId, offset Offset, size uint32) error {
+	e := idx.WalkIndexFile(file, func(key NeedleId, offset Offset, size Size) error {
 		nm.MaybeSetMaxFileKey(key)
-		if !offset.IsZero() && size != TombstoneFileSize {
+		if !offset.IsZero() && size.IsValid() {
 			nm.FileCounter++
 			nm.FileByteCounter = nm.FileByteCounter + uint64(size)
 			oldOffset, oldSize := nm.m.Set(NeedleId(key), offset, size)
-			if !oldOffset.IsZero() && oldSize != TombstoneFileSize {
+			if !oldOffset.IsZero() && oldSize.IsValid() {
 				nm.DeletionCounter++
 				nm.DeletionByteCounter = nm.DeletionByteCounter + uint64(oldSize)
 			}
@@ -49,7 +49,7 @@ func doLoading(file *os.File, nm *NeedleMap) (*NeedleMap, error) {
 	return nm, e
 }
 
-func (nm *NeedleMap) Put(key NeedleId, offset Offset, size uint32) error {
+func (nm *NeedleMap) Put(key NeedleId, offset Offset, size Size) error {
 	_, oldSize := nm.m.Set(NeedleId(key), offset, size)
 	nm.logPut(key, oldSize, size)
 	return nm.appendToIndexFile(key, offset, size)
diff --git a/weed/storage/needle_map_metric.go b/weed/storage/needle_map_metric.go
index 823a04108..3618dada9 100644
--- a/weed/storage/needle_map_metric.go
+++ b/weed/storage/needle_map_metric.go
@@ -18,31 +18,31 @@ type mapMetric struct {
 	MaximumFileKey      uint64 `json:"MaxFileKey"`
 }
 
-func (mm *mapMetric) logDelete(deletedByteCount uint32) {
+func (mm *mapMetric) logDelete(deletedByteCount Size) {
 	if mm == nil {
 		return
 	}
 	mm.LogDeletionCounter(deletedByteCount)
 }
 
-func (mm *mapMetric) logPut(key NeedleId, oldSize uint32, newSize uint32) {
+func (mm *mapMetric) logPut(key NeedleId, oldSize Size, newSize Size) {
 	if mm == nil {
 		return
 	}
 	mm.MaybeSetMaxFileKey(key)
 	mm.LogFileCounter(newSize)
-	if oldSize > 0 && oldSize != TombstoneFileSize {
+	if oldSize > 0 && oldSize.IsValid() {
 		mm.LogDeletionCounter(oldSize)
 	}
 }
-func (mm *mapMetric) LogFileCounter(newSize uint32) {
+func (mm *mapMetric) LogFileCounter(newSize Size) {
 	if mm == nil {
 		return
 	}
 	atomic.AddUint32(&mm.FileCounter, 1)
 	atomic.AddUint64(&mm.FileByteCounter, uint64(newSize))
 }
-func (mm *mapMetric) LogDeletionCounter(oldSize uint32) {
+func (mm *mapMetric) LogDeletionCounter(oldSize Size) {
 	if mm == nil {
 		return
 	}
@@ -97,11 +97,11 @@ func newNeedleMapMetricFromIndexFile(r *os.File) (mm *mapMetric, err error) {
 	buf := make([]byte, NeedleIdSize)
 	err = reverseWalkIndexFile(r, func(entryCount int64) {
 		bf = bloom.NewWithEstimates(uint(entryCount), 0.001)
-	}, func(key NeedleId, offset Offset, size uint32) error {
+	}, func(key NeedleId, offset Offset, size Size) error {
 
 		mm.MaybeSetMaxFileKey(key)
 		NeedleIdToBytes(buf, key)
-		if size != TombstoneFileSize {
+		if size.IsValid() {
 			mm.FileByteCounter += uint64(size)
 		}
 
@@ -111,7 +111,7 @@ func newNeedleMapMetricFromIndexFile(r *os.File) (mm *mapMetric, err error) {
 		} else {
 			// deleted file
 			mm.DeletionCounter++
-			if size != TombstoneFileSize {
+			if size.IsValid() {
 				// previously already deleted file
 				mm.DeletionByteCounter += uint64(size)
 			}
@@ -121,7 +121,7 @@ func newNeedleMapMetricFromIndexFile(r *os.File) (mm *mapMetric, err error) {
 	return
 }
 
-func reverseWalkIndexFile(r *os.File, initFn func(entryCount int64), fn func(key NeedleId, offset Offset, size uint32) error) error {
+func reverseWalkIndexFile(r *os.File, initFn func(entryCount int64), fn func(key NeedleId, offset Offset, size Size) error) error {
 	fi, err := r.Stat()
 	if err != nil {
 		return fmt.Errorf("file %s stat error: %v", r.Name(), err)
diff --git a/weed/storage/needle_map_metric_test.go b/weed/storage/needle_map_metric_test.go
index ae2177a30..362659a11 100644
--- a/weed/storage/needle_map_metric_test.go
+++ b/weed/storage/needle_map_metric_test.go
@@ -15,7 +15,7 @@ func TestFastLoadingNeedleMapMetrics(t *testing.T) {
 	nm := NewCompactNeedleMap(idxFile)
 
 	for i := 0; i < 10000; i++ {
-		nm.Put(Uint64ToNeedleId(uint64(i+1)), Uint32ToOffset(uint32(0)), uint32(1))
+		nm.Put(Uint64ToNeedleId(uint64(i+1)), Uint32ToOffset(uint32(0)), Size(1))
 		if rand.Float32() < 0.2 {
 			nm.Delete(Uint64ToNeedleId(uint64(rand.Int63n(int64(i))+1)), Uint32ToOffset(uint32(0)))
 		}
diff --git a/weed/storage/needle_map_sorted_file.go b/weed/storage/needle_map_sorted_file.go
index e6f9258f3..1ca113ca9 100644
--- a/weed/storage/needle_map_sorted_file.go
+++ b/weed/storage/needle_map_sorted_file.go
@@ -65,7 +65,7 @@ func (m *SortedFileNeedleMap) Get(key NeedleId) (element *needle_map.NeedleValue
 
 }
 
-func (m *SortedFileNeedleMap) Put(key NeedleId, offset Offset, size uint32) error {
+func (m *SortedFileNeedleMap) Put(key NeedleId, offset Offset, size Size) error {
 	return os.ErrInvalid
 }
 
@@ -80,7 +80,7 @@ func (m *SortedFileNeedleMap) Delete(key NeedleId, offset Offset) error {
 		return err
 	}
 
-	if size == TombstoneFileSize {
+	if size.IsDeleted() {
 		return nil
 	}
 
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 02372da97..3f16688bf 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -23,6 +23,10 @@ const (
 	MAX_TTL_VOLUME_REMOVAL_DELAY = 10 // 10 minutes
 )
 
+type ReadOption struct {
+	ReadDeleted bool
+}
+
 /*
  * A VolumeServer contains one Store
  */
@@ -273,7 +277,7 @@ func (s *Store) WriteVolumeNeedle(i needle.VolumeId, n *needle.Needle, fsync boo
 	return
 }
 
-func (s *Store) DeleteVolumeNeedle(i needle.VolumeId, n *needle.Needle) (uint32, error) {
+func (s *Store) DeleteVolumeNeedle(i needle.VolumeId, n *needle.Needle) (Size, error) {
 	if v := s.findVolume(i); v != nil {
 		if v.noWriteOrDelete {
 			return 0, fmt.Errorf("volume %d is read only", i)
@@ -283,9 +287,9 @@ func (s *Store) DeleteVolumeNeedle(i needle.VolumeId, n *needle.Needle) (uint32,
 	return 0, fmt.Errorf("volume %d not found on %s:%d", i, s.Ip, s.Port)
 }
 
-func (s *Store) ReadVolumeNeedle(i needle.VolumeId, n *needle.Needle) (int, error) {
+func (s *Store) ReadVolumeNeedle(i needle.VolumeId, n *needle.Needle, readOption *ReadOption) (int, error) {
 	if v := s.findVolume(i); v != nil {
-		return v.readNeedle(n)
+		return v.readNeedle(n, readOption)
 	}
 	return 0, fmt.Errorf("volume %d not found", i)
 }
@@ -303,7 +307,20 @@ func (s *Store) MarkVolumeReadonly(i needle.VolumeId) error {
 	if v == nil {
 		return fmt.Errorf("volume %d not found", i)
 	}
+	v.noWriteLock.Lock()
 	v.noWriteOrDelete = true
+	v.noWriteLock.Unlock()
+	return nil
+}
+
+func (s *Store) MarkVolumeWritable(i needle.VolumeId) error {
+	v := s.findVolume(i)
+	if v == nil {
+		return fmt.Errorf("volume %d not found", i)
+	}
+	v.noWriteLock.Lock()
+	v.noWriteOrDelete = false
+	v.noWriteLock.Unlock()
 	return nil
 }
 
diff --git a/weed/storage/store_ec.go b/weed/storage/store_ec.go
index 2b0df439c..8b4388519 100644
--- a/weed/storage/store_ec.go
+++ b/weed/storage/store_ec.go
@@ -124,7 +124,7 @@ func (s *Store) ReadEcShardNeedle(vid needle.VolumeId, n *needle.Needle) (int, e
 			if err != nil {
 				return 0, fmt.Errorf("locate in local ec volume: %v", err)
 			}
-			if size == types.TombstoneFileSize {
+			if size.IsDeleted() {
 				return 0, fmt.Errorf("entry %s is deleted", n.Id)
 			}
 
diff --git a/weed/storage/types/needle_types.go b/weed/storage/types/needle_types.go
index 2ebb392db..7e30d2bd8 100644
--- a/weed/storage/types/needle_types.go
+++ b/weed/storage/types/needle_types.go
@@ -2,9 +2,9 @@ package types
 
 import (
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/util"
-	"math"
 	"strconv"
+
+	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
 type Offset struct {
@@ -12,6 +12,15 @@ type Offset struct {
 	OffsetLower
 }
 
+type Size int32
+
+func (s Size) IsDeleted() bool {
+	return s < 0 || s == TombstoneFileSize
+}
+func (s Size) IsValid() bool {
+	return s >0 && s != TombstoneFileSize
+}
+
 type OffsetLower struct {
 	b3 byte
 	b2 byte
@@ -27,7 +36,7 @@ const (
 	NeedleMapEntrySize = NeedleIdSize + OffsetSize + SizeSize
 	TimestampSize      = 8 // int64 size
 	NeedlePaddingSize  = 8
-	TombstoneFileSize  = math.MaxUint32
+	TombstoneFileSize  = Size(-1)
 	CookieSize         = 4
 )
 
@@ -49,3 +58,11 @@ func ParseCookie(cookieString string) (Cookie, error) {
 	}
 	return Cookie(cookie), nil
 }
+
+func BytesToSize(bytes []byte) Size {
+	return Size(util.BytesToUint32(bytes))
+}
+
+func SizeToBytes(bytes []byte, size Size) {
+	util.Uint32toBytes(bytes, uint32(size))
+}
diff --git a/weed/storage/volume.go b/weed/storage/volume.go
index 73fdb417d..2d46fbcdf 100644
--- a/weed/storage/volume.go
+++ b/weed/storage/volume.go
@@ -27,6 +27,7 @@ type Volume struct {
 	needleMapKind      NeedleMapType
 	noWriteOrDelete    bool // if readonly, either noWriteOrDelete or noWriteCanDelete
 	noWriteCanDelete   bool // if readonly, either noWriteOrDelete or noWriteCanDelete
+	noWriteLock        sync.RWMutex
 	hasRemoteFile      bool // if the volume has a remote file
 	MemoryMapMaxSizeMb uint32
 
@@ -58,6 +59,8 @@ func NewVolume(dirname string, collection string, id needle.VolumeId, needleMapK
 }
 
 func (v *Volume) String() string {
+	v.noWriteLock.RLock()
+	defer v.noWriteLock.RUnlock()
 	return fmt.Sprintf("Id:%v, dir:%s, Collection:%s, dataFile:%v, nm:%v, noWrite:%v canDelete:%v", v.Id, v.dir, v.Collection, v.DataBackend, v.nm, v.noWriteOrDelete || v.noWriteCanDelete, v.noWriteCanDelete)
 }
 
@@ -245,5 +248,7 @@ func (v *Volume) RemoteStorageNameKey() (storageName, storageKey string) {
 }
 
 func (v *Volume) IsReadOnly() bool {
+	v.noWriteLock.RLock()
+	defer v.noWriteLock.RUnlock()
 	return v.noWriteOrDelete || v.noWriteCanDelete || v.location.isDiskSpaceLow
 }
diff --git a/weed/storage/volume_backup.go b/weed/storage/volume_backup.go
index f7075fe2b..595bd8a35 100644
--- a/weed/storage/volume_backup.go
+++ b/weed/storage/volume_backup.go
@@ -253,7 +253,7 @@ func (scanner *VolumeFileScanner4GenIdx) ReadNeedleBody() bool {
 }
 
 func (scanner *VolumeFileScanner4GenIdx) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
-	if n.Size > 0 && n.Size != TombstoneFileSize {
+	if n.Size > 0 && n.Size.IsValid() {
 		return scanner.v.nm.Put(n.Id, ToOffset(offset), n.Size)
 	}
 	return scanner.v.nm.Delete(n.Id, ToOffset(offset))
diff --git a/weed/storage/volume_checking.go b/weed/storage/volume_checking.go
index c33f0049a..7a5a423b4 100644
--- a/weed/storage/volume_checking.go
+++ b/weed/storage/volume_checking.go
@@ -27,7 +27,7 @@ func CheckVolumeDataIntegrity(v *Volume, indexFile *os.File) (lastAppendAtNs uin
 	if offset.IsZero() {
 		return 0, nil
 	}
-	if size == TombstoneFileSize {
+	if size.IsDeleted() {
 		size = 0
 	}
 	if lastAppendAtNs, e = verifyNeedleIntegrity(v.DataBackend, v.Version(), offset.ToAcutalOffset(), key, size); e != nil {
@@ -55,7 +55,7 @@ func readIndexEntryAtOffset(indexFile *os.File, offset int64) (bytes []byte, err
 	return
 }
 
-func verifyNeedleIntegrity(datFile backend.BackendStorageFile, v needle.Version, offset int64, key NeedleId, size uint32) (lastAppendAtNs uint64, err error) {
+func verifyNeedleIntegrity(datFile backend.BackendStorageFile, v needle.Version, offset int64, key NeedleId, size Size) (lastAppendAtNs uint64, err error) {
 	n := new(needle.Needle)
 	if err = n.ReadData(datFile, offset, size, v); err != nil {
 		return n.AppendAtNs, fmt.Errorf("read data [%d,%d) : %v", offset, offset+int64(size), err)
diff --git a/weed/storage/volume_read_write.go b/weed/storage/volume_read_write.go
index edb5f48d8..e77010dbd 100644
--- a/weed/storage/volume_read_write.go
+++ b/weed/storage/volume_read_write.go
@@ -25,7 +25,7 @@ func (v *Volume) isFileUnchanged(n *needle.Needle) bool {
 	}
 
 	nv, ok := v.nm.Get(n.Id)
-	if ok && !nv.Offset.IsZero() && nv.Size != TombstoneFileSize {
+	if ok && !nv.Offset.IsZero() && nv.Size.IsValid() {
 		oldNeedle := new(needle.Needle)
 		err := oldNeedle.ReadData(v.DataBackend, nv.Offset.ToAcutalOffset(), nv.Size, v.Version())
 		if err != nil {
@@ -68,9 +68,9 @@ func (v *Volume) asyncRequestAppend(request *needle.AsyncRequest) {
 	v.asyncRequestsChan <- request
 }
 
-func (v *Volume) syncWrite(n *needle.Needle) (offset uint64, size uint32, isUnchanged bool, err error) {
+func (v *Volume) syncWrite(n *needle.Needle) (offset uint64, size Size, isUnchanged bool, err error) {
 	// glog.V(4).Infof("writing needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
-	actualSize := needle.GetActualSize(uint32(len(n.Data)), v.Version())
+	actualSize := needle.GetActualSize(Size(len(n.Data)), v.Version())
 
 	v.dataFileAccessLock.Lock()
 	defer v.dataFileAccessLock.Unlock()
@@ -80,7 +80,7 @@ func (v *Volume) syncWrite(n *needle.Needle) (offset uint64, size uint32, isUnch
 		return
 	}
 	if v.isFileUnchanged(n) {
-		size = n.DataSize
+		size = Size(n.DataSize)
 		isUnchanged = true
 		return
 	}
@@ -120,7 +120,7 @@ func (v *Volume) syncWrite(n *needle.Needle) (offset uint64, size uint32, isUnch
 	return
 }
 
-func (v *Volume) writeNeedle2(n *needle.Needle, fsync bool) (offset uint64, size uint32, isUnchanged bool, err error) {
+func (v *Volume) writeNeedle2(n *needle.Needle, fsync bool) (offset uint64, size Size, isUnchanged bool, err error) {
 	// glog.V(4).Infof("writing needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
 	if n.Ttl == needle.EMPTY_TTL && v.Ttl != needle.EMPTY_TTL {
 		n.SetHasTtl()
@@ -132,7 +132,7 @@ func (v *Volume) writeNeedle2(n *needle.Needle, fsync bool) (offset uint64, size
 	} else {
 		asyncRequest := needle.NewAsyncRequest(n, true)
 		// using len(n.Data) here instead of n.Size before n.Size is populated in n.Append()
-		asyncRequest.ActualSize = needle.GetActualSize(uint32(len(n.Data)), v.Version())
+		asyncRequest.ActualSize = needle.GetActualSize(Size(len(n.Data)), v.Version())
 
 		v.asyncRequestAppend(asyncRequest)
 		offset, _, isUnchanged, err = asyncRequest.WaitComplete()
@@ -141,10 +141,10 @@ func (v *Volume) writeNeedle2(n *needle.Needle, fsync bool) (offset uint64, size
 	}
 }
 
-func (v *Volume) doWriteRequest(n *needle.Needle) (offset uint64, size uint32, isUnchanged bool, err error) {
+func (v *Volume) doWriteRequest(n *needle.Needle) (offset uint64, size Size, isUnchanged bool, err error) {
 	// glog.V(4).Infof("writing needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
 	if v.isFileUnchanged(n) {
-		size = n.DataSize
+		size = Size(n.DataSize)
 		isUnchanged = true
 		return
 	}
@@ -183,7 +183,7 @@ func (v *Volume) doWriteRequest(n *needle.Needle) (offset uint64, size uint32, i
 	return
 }
 
-func (v *Volume) syncDelete(n *needle.Needle) (uint32, error) {
+func (v *Volume) syncDelete(n *needle.Needle) (Size, error) {
 	glog.V(4).Infof("delete needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
 	actualSize := needle.GetActualSize(0, v.Version())
 	v.dataFileAccessLock.Lock()
@@ -195,8 +195,8 @@ func (v *Volume) syncDelete(n *needle.Needle) (uint32, error) {
 	}
 
 	nv, ok := v.nm.Get(n.Id)
-	//fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
-	if ok && nv.Size != TombstoneFileSize {
+	// fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
+	if ok && nv.Size.IsValid() {
 		size := nv.Size
 		n.Data = nil
 		n.AppendAtNs = uint64(time.Now().UnixNano())
@@ -213,7 +213,7 @@ func (v *Volume) syncDelete(n *needle.Needle) (uint32, error) {
 	return 0, nil
 }
 
-func (v *Volume) deleteNeedle2(n *needle.Needle) (uint32, error) {
+func (v *Volume) deleteNeedle2(n *needle.Needle) (Size, error) {
 	// todo: delete info is always appended no fsync, it may need fsync in future
 	fsync := false
 
@@ -226,15 +226,15 @@ func (v *Volume) deleteNeedle2(n *needle.Needle) (uint32, error) {
 		v.asyncRequestAppend(asyncRequest)
 		_, size, _, err := asyncRequest.WaitComplete()
 
-		return uint32(size), err
+		return Size(size), err
 	}
 }
 
-func (v *Volume) doDeleteRequest(n *needle.Needle) (uint32, error) {
+func (v *Volume) doDeleteRequest(n *needle.Needle) (Size, error) {
 	glog.V(4).Infof("delete needle %s", needle.NewFileIdFromNeedle(v.Id, n).String())
 	nv, ok := v.nm.Get(n.Id)
-	//fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
-	if ok && nv.Size != TombstoneFileSize {
+	// fmt.Println("key", n.Id, "volume offset", nv.Offset, "data_size", n.Size, "cached size", nv.Size)
+	if ok && nv.Size.IsValid() {
 		size := nv.Size
 		n.Data = nil
 		n.AppendAtNs = uint64(time.Now().UnixNano())
@@ -252,7 +252,7 @@ func (v *Volume) doDeleteRequest(n *needle.Needle) (uint32, error) {
 }
 
 // read fills in Needle content by looking up n.Id from NeedleMapper
-func (v *Volume) readNeedle(n *needle.Needle) (int, error) {
+func (v *Volume) readNeedle(n *needle.Needle, readOption *ReadOption) (int, error) {
 	v.dataFileAccessLock.RLock()
 	defer v.dataFileAccessLock.RUnlock()
 
@@ -260,13 +260,19 @@ func (v *Volume) readNeedle(n *needle.Needle) (int, error) {
 	if !ok || nv.Offset.IsZero() {
 		return -1, ErrorNotFound
 	}
-	if nv.Size == TombstoneFileSize {
-		return -1, errors.New("already deleted")
+	readSize := nv.Size
+	if readSize.IsDeleted() {
+		if readOption != nil && readOption.ReadDeleted && readSize != TombstoneFileSize {
+			glog.V(3).Infof("reading deleted %s", n.String())
+			readSize = -readSize
+		} else {
+			return -1, errors.New("already deleted")
+		}
 	}
-	if nv.Size == 0 {
+	if readSize == 0 {
 		return 0, nil
 	}
-	err := n.ReadData(v.DataBackend, nv.Offset.ToAcutalOffset(), nv.Size, v.Version())
+	err := n.ReadData(v.DataBackend, nv.Offset.ToAcutalOffset(), readSize, v.Version())
 	if err != nil {
 		return 0, err
 	}
@@ -299,7 +305,7 @@ func (v *Volume) startWorker() {
 			currentBytesToWrite := int64(0)
 			for {
 				request, ok := <-v.asyncRequestsChan
-				//volume may be closed
+				// volume may be closed
 				if !ok {
 					chanClosed = true
 					break
@@ -402,8 +408,8 @@ func ScanVolumeFileFrom(version needle.Version, datBackend backend.BackendStorag
 		if volumeFileScanner.ReadNeedleBody() {
 			if needleBody, err = n.ReadNeedleBody(datBackend, version, offset+NeedleHeaderSize, rest); err != nil {
 				glog.V(0).Infof("cannot read needle body: %v", err)
-				//err = fmt.Errorf("cannot read needle body: %v", err)
-				//return
+				// err = fmt.Errorf("cannot read needle body: %v", err)
+				// return
 			}
 		}
 		err := volumeFileScanner.VisitNeedle(n, offset, nh, needleBody)
diff --git a/weed/storage/volume_super_block.go b/weed/storage/volume_super_block.go
index 5e913e062..20223ac1b 100644
--- a/weed/storage/volume_super_block.go
+++ b/weed/storage/volume_super_block.go
@@ -26,8 +26,10 @@ func (v *Volume) maybeWriteSuperBlock() error {
 			if dataFile, e = os.Create(v.DataBackend.Name()); e == nil {
 				v.DataBackend = backend.NewDiskFile(dataFile)
 				if _, e = v.DataBackend.WriteAt(v.SuperBlock.Bytes(), 0); e == nil {
+					v.noWriteLock.Lock()
 					v.noWriteOrDelete = false
 					v.noWriteCanDelete = false
+					v.noWriteLock.Unlock()
 				}
 			}
 		}
diff --git a/weed/storage/volume_vacuum.go b/weed/storage/volume_vacuum.go
index ed8172909..a3e5800df 100644
--- a/weed/storage/volume_vacuum.go
+++ b/weed/storage/volume_vacuum.go
@@ -207,7 +207,7 @@ func (v *Volume) makeupDiff(newDatFileName, newIdxFileName, oldDatFileName, oldI
 
 	type keyField struct {
 		offset Offset
-		size   uint32
+		size   Size
 	}
 	incrementedHasUpdatedIndexEntry := make(map[NeedleId]keyField)
 
@@ -274,7 +274,7 @@ func (v *Volume) makeupDiff(newDatFileName, newIdxFileName, oldDatFileName, oldI
 		}
 
 		//updated needle
-		if !increIdxEntry.offset.IsZero() && increIdxEntry.size != 0 && increIdxEntry.size != TombstoneFileSize {
+		if !increIdxEntry.offset.IsZero() && increIdxEntry.size != 0 && increIdxEntry.size.IsValid() {
 			//even the needle cache in memory is hit, the need_bytes is correct
 			glog.V(4).Infof("file %d offset %d size %d", key, increIdxEntry.offset.ToAcutalOffset(), increIdxEntry.size)
 			var needleBytes []byte
@@ -335,7 +335,7 @@ func (scanner *VolumeFileScanner4Vacuum) VisitNeedle(n *needle.Needle, offset in
 	}
 	nv, ok := scanner.v.nm.Get(n.Id)
 	glog.V(4).Infoln("needle expected offset ", offset, "ok", ok, "nv", nv)
-	if ok && nv.Offset.ToAcutalOffset() == offset && nv.Size > 0 && nv.Size != TombstoneFileSize {
+	if ok && nv.Offset.ToAcutalOffset() == offset && nv.Size > 0 && nv.Size.IsValid() {
 		if err := scanner.nm.Set(n.Id, ToOffset(scanner.newOffset), n.Size); err != nil {
 			return fmt.Errorf("cannot put needle: %s", err)
 		}
@@ -413,7 +413,7 @@ func copyDataBasedOnIndexFile(srcDatName, srcIdxName, dstDatName, datIdxName str
 
 		offset, size := value.Offset, value.Size
 
-		if offset.IsZero() || size == TombstoneFileSize {
+		if offset.IsZero() || size.IsDeleted() {
 			return nil
 		}
 
diff --git a/weed/storage/volume_vacuum_test.go b/weed/storage/volume_vacuum_test.go
index 1b5161e63..f96e9b0cf 100644
--- a/weed/storage/volume_vacuum_test.go
+++ b/weed/storage/volume_vacuum_test.go
@@ -113,11 +113,11 @@ func TestCompaction(t *testing.T) {
 		}
 
 		n := newEmptyNeedle(uint64(i))
-		size, err := v.readNeedle(n)
+		size, err := v.readNeedle(n, nil)
 		if err != nil {
 			t.Fatalf("read file %d: %v", i, err)
 		}
-		if infos[i-1].size != uint32(size) {
+		if infos[i-1].size != types.Size(size) {
 			t.Fatalf("read file %d size mismatch expected %d found %d", i, infos[i-1].size, size)
 		}
 		if infos[i-1].crc != n.Checksum {
@@ -151,7 +151,7 @@ func doSomeWritesDeletes(i int, v *Volume, t *testing.T, infos []*needleInfo) {
 }
 
 type needleInfo struct {
-	size uint32
+	size types.Size
 	crc  needle.CRC
 }
 
diff --git a/weed/topology/store_replicate.go b/weed/topology/store_replicate.go
index 481e72fe0..faa16e2f6 100644
--- a/weed/topology/store_replicate.go
+++ b/weed/topology/store_replicate.go
@@ -14,6 +14,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/security"
 	"github.com/chrislusf/seaweedfs/weed/storage"
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
 	"github.com/chrislusf/seaweedfs/weed/util"
 )
 
@@ -92,7 +93,7 @@ func ReplicatedWrite(masterNode string, s *storage.Store, volumeId needle.Volume
 
 func ReplicatedDelete(masterNode string, store *storage.Store,
 	volumeId needle.VolumeId, n *needle.Needle,
-	r *http.Request) (size uint32, err error) {
+	r *http.Request) (size types.Size, err error) {
 
 	//check JWT
 	jwt := security.GetJwt(r)
diff --git a/weed/topology/topology.go b/weed/topology/topology.go
index 993f444a7..a11a1bac6 100644
--- a/weed/topology/topology.go
+++ b/weed/topology/topology.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"math/rand"
 	"sync"
+	"time"
 
 	"github.com/chrislusf/raft"
 
@@ -65,31 +66,29 @@ func (t *Topology) IsLeader() bool {
 		if t.RaftServer.State() == raft.Leader {
 			return true
 		}
-		if t.RaftServer.Leader() == "" {
-			return true
-		}
 	}
 	return false
 }
 
 func (t *Topology) Leader() (string, error) {
 	l := ""
-	if t.RaftServer != nil {
-		l = t.RaftServer.Leader()
-	} else {
-		return "", errors.New("Raft Server not ready yet!")
-	}
-
-	if l == "" {
-		// We are a single node cluster, we are the leader
-		return t.RaftServer.Name(), nil
+	for count := 0; count < 3; count++ {
+		if t.RaftServer != nil {
+			l = t.RaftServer.Leader()
+		} else {
+			return "", errors.New("Raft Server not ready yet!")
+		}
+		if l != "" {
+			break
+		} else {
+			time.Sleep(time.Duration(5+count) * time.Second)
+		}
 	}
-
 	return l, nil
 }
 
 func (t *Topology) Lookup(collection string, vid needle.VolumeId) (dataNodes []*DataNode) {
-	//maybe an issue if lots of collections?
+	// maybe an issue if lots of collections?
 	if collection == "" {
 		for _, c := range t.collectionMap.Items() {
 			if list := c.(*Collection).Lookup(vid); list != nil {
diff --git a/weed/util/chunk_cache/chunk_cache.go b/weed/util/chunk_cache/chunk_cache.go
index 17b64fb6c..a1a054215 100644
--- a/weed/util/chunk_cache/chunk_cache.go
+++ b/weed/util/chunk_cache/chunk_cache.go
@@ -13,16 +13,21 @@ const (
 	onDiskCacheSizeLimit1 = 4 * memCacheSizeLimit
 )
 
+type ChunkCache interface {
+	GetChunk(fileId string, minSize uint64) (data []byte)
+	SetChunk(fileId string, data []byte)
+}
+
 // a global cache for recently accessed file chunks
-type ChunkCache struct {
+type TieredChunkCache struct {
 	memCache   *ChunkCacheInMemory
 	diskCaches []*OnDiskCacheLayer
 	sync.RWMutex
 }
 
-func NewChunkCache(maxEntries int64, dir string, diskSizeMB int64) *ChunkCache {
+func NewTieredChunkCache(maxEntries int64, dir string, diskSizeMB int64) *TieredChunkCache {
 
-	c := &ChunkCache{
+	c := &TieredChunkCache{
 		memCache: NewChunkCacheInMemory(maxEntries),
 	}
 	c.diskCaches = make([]*OnDiskCacheLayer, 3)
@@ -33,7 +38,7 @@ func NewChunkCache(maxEntries int64, dir string, diskSizeMB int64) *ChunkCache {
 	return c
 }
 
-func (c *ChunkCache) GetChunk(fileId string, chunkSize uint64) (data []byte) {
+func (c *TieredChunkCache) GetChunk(fileId string, minSize uint64) (data []byte) {
 	if c == nil {
 		return
 	}
@@ -41,14 +46,14 @@ func (c *ChunkCache) GetChunk(fileId string, chunkSize uint64) (data []byte) {
 	c.RLock()
 	defer c.RUnlock()
 
-	return c.doGetChunk(fileId, chunkSize)
+	return c.doGetChunk(fileId, minSize)
 }
 
-func (c *ChunkCache) doGetChunk(fileId string, chunkSize uint64) (data []byte) {
+func (c *TieredChunkCache) doGetChunk(fileId string, minSize uint64) (data []byte) {
 
-	if chunkSize < memCacheSizeLimit {
+	if minSize < memCacheSizeLimit {
 		data = c.memCache.GetChunk(fileId)
-		if len(data) >= int(chunkSize) {
+		if len(data) >= int(minSize) {
 			return data
 		}
 	}
@@ -59,21 +64,21 @@ func (c *ChunkCache) doGetChunk(fileId string, chunkSize uint64) (data []byte) {
 		return nil
 	}
 
-	if chunkSize < onDiskCacheSizeLimit0 {
+	if minSize < onDiskCacheSizeLimit0 {
 		data = c.diskCaches[0].getChunk(fid.Key)
-		if len(data) >= int(chunkSize) {
+		if len(data) >= int(minSize) {
 			return data
 		}
 	}
-	if chunkSize < onDiskCacheSizeLimit1 {
+	if minSize < onDiskCacheSizeLimit1 {
 		data = c.diskCaches[1].getChunk(fid.Key)
-		if len(data) >= int(chunkSize) {
+		if len(data) >= int(minSize) {
 			return data
 		}
 	}
 	{
 		data = c.diskCaches[2].getChunk(fid.Key)
-		if len(data) >= int(chunkSize) {
+		if len(data) >= int(minSize) {
 			return data
 		}
 	}
@@ -82,19 +87,19 @@ func (c *ChunkCache) doGetChunk(fileId string, chunkSize uint64) (data []byte) {
 
 }
 
-func (c *ChunkCache) SetChunk(fileId string, data []byte) {
+func (c *TieredChunkCache) SetChunk(fileId string, data []byte) {
 	if c == nil {
 		return
 	}
 	c.Lock()
 	defer c.Unlock()
 
-	glog.V(4).Infof("SetChunk %s size %d\n", fileId, len(data))
+	glog.V(5).Infof("SetChunk %s size %d\n", fileId, len(data))
 
 	c.doSetChunk(fileId, data)
 }
 
-func (c *ChunkCache) doSetChunk(fileId string, data []byte) {
+func (c *TieredChunkCache) doSetChunk(fileId string, data []byte) {
 
 	if len(data) < memCacheSizeLimit {
 		c.memCache.SetChunk(fileId, data)
@@ -116,7 +121,7 @@ func (c *ChunkCache) doSetChunk(fileId string, data []byte) {
 
 }
 
-func (c *ChunkCache) Shutdown() {
+func (c *TieredChunkCache) Shutdown() {
 	if c == nil {
 		return
 	}
diff --git a/weed/util/chunk_cache/chunk_cache_on_disk.go b/weed/util/chunk_cache/chunk_cache_on_disk.go
index d74f87b0c..356dfe188 100644
--- a/weed/util/chunk_cache/chunk_cache_on_disk.go
+++ b/weed/util/chunk_cache/chunk_cache_on_disk.go
@@ -63,7 +63,7 @@ func LoadOrCreateChunkCacheVolume(fileName string, preallocate int64) (*ChunkCac
 		return nil, fmt.Errorf("cannot write cache index %s.idx: %v", v.fileName, err)
 	}
 
-	glog.V(0).Infoln("loading leveldb", v.fileName+".ldb")
+	glog.V(1).Infoln("loading leveldb", v.fileName+".ldb")
 	opts := &opt.Options{
 		BlockCacheCapacity:            2 * 1024 * 1024, // default value is 8MiB
 		WriteBuffer:                   1 * 1024 * 1024, // default value is 4MiB
@@ -137,7 +137,7 @@ func (v *ChunkCacheVolume) WriteNeedle(key types.NeedleId, data []byte) error {
 		v.fileSize += int64(types.NeedlePaddingSize - extraSize)
 	}
 
-	if err := v.nm.Put(key, types.ToOffset(offset), uint32(len(data))); err != nil {
+	if err := v.nm.Put(key, types.ToOffset(offset), types.Size(len(data))); err != nil {
 		return err
 	}
 
diff --git a/weed/util/chunk_cache/chunk_cache_on_disk_test.go b/weed/util/chunk_cache/chunk_cache_on_disk_test.go
index f061f2ba2..558488f18 100644
--- a/weed/util/chunk_cache/chunk_cache_on_disk_test.go
+++ b/weed/util/chunk_cache/chunk_cache_on_disk_test.go
@@ -16,7 +16,7 @@ func TestOnDisk(t *testing.T) {
 
 	totalDiskSizeMb := int64(32)
 
-	cache := NewChunkCache(0, tmpDir, totalDiskSizeMb)
+	cache := NewTieredChunkCache(0, tmpDir, totalDiskSizeMb)
 
 	writeCount := 5
 	type test_data struct {
@@ -45,7 +45,7 @@ func TestOnDisk(t *testing.T) {
 
 	cache.Shutdown()
 
-	cache = NewChunkCache(0, tmpDir, totalDiskSizeMb)
+	cache = NewTieredChunkCache(0, tmpDir, totalDiskSizeMb)
 
 	for i := 0; i < writeCount; i++ {
 		data := cache.GetChunk(testData[i].fileId, testData[i].size)
diff --git a/weed/util/constants.go b/weed/util/constants.go
index 10955acde..e614a5d24 100644
--- a/weed/util/constants.go
+++ b/weed/util/constants.go
@@ -5,7 +5,7 @@ import (
 )
 
 var (
-	VERSION = fmt.Sprintf("%s %d.%d", sizeLimit, 1, 88)
+	VERSION = fmt.Sprintf("%s %d.%d", sizeLimit, 1, 90)
 	COMMIT  = ""
 )